Stargate Atlantis Season 4

Season four of Stargate Atlantis began airing on September 28, 2007 on the US-American Sci Fi Channel. The fourth season concluded after 20 episodes on March 7, 2008 on Sci Fi. The series was developed by Brad Wright and Robert C. Cooper, who also served as executive producers. Amanda Tapping (Col. Samantha Carter) joins the cast as a regular for 14 episodes, Jewel Staite (Dr. Jennifer Keller) was a recurring character for eleven episodes, while regular cast member Torri Higginson (Dr. Elizabeth Weir) was a recurring cast member for four episodes. Other season four regular cast members include Joe Flanigan, Jason Momoa, Rachel Luttrell, and David Hewlett.
==Production==
With the season premiere, , Amanda Tapping replaces Torri Higginson in the opening credits sequence, with Paul McGillion no longer appearing. This marks Amanda Tapping's first appearance as a main character on Atlantis. It also marks the only time an actor has appeared in the opening credits of both Stargate SG-1 and Atlantis. Christopher Judge has a cameo appearance as his Stargate SG-1 character Teal'c in and guest stars in the episode . Judge is the last original Stargate SG-1 regular to appear on Atlantis, as the other three characters in the original SG-1 team all appeared in Atlantis's first season, as did other SG-1 characters Hank Landry and George Hammond. Of the three other SG-1 regulars (namely Cameron Mitchell, Vala Mal Doran and Jonas Quinn), Mitchell and Vala visited Atlantis in the SG-1 crossover episode . Jodelle Ferland, who plays Princess Harmony in the episode , previously appeared in the episode in Stargate SG-1 season 10 as a young Adria; and Crystal Lowe previously appeared in the episode in season 1 of Stargate SG-1.
== Release and reception ==
In September 2007, unfinished versions of and were leaked onto the internet. Shortly after, fans who used iTunes to download "Adrift" discovered that they had in fact purchased instead, three weeks before it was set to premiere on Sci Fi Channel in the USA. The mix-up probably comes from the fact that "Doppelganger" was the first episode of the season to be filmed, and thus carries an internal production number of 401 at the studio. Late in the season, was another episode that was mistakenly released by iTunes several days before its airdate. received a rating of 1.4 million viewers, the highest rated episode in the fourth season. It was also the US Sci-fi Channel's 2nd highest rated show that week: the 1st was an SF TV-movie, Beyond Loch Ness (which had a rating of 1.7 million), which happened to star Atlantis actor Paul McGillion and SG-1's Don S. Davis. Stargate Atlantis, Season 4, has been aired on the following channels: Sci-Fi Channel in the USA, TV6 in Sweden, and Sky 1 in the UK.
"Adrift" earned an Emmy nomination for "Outstanding Special Visual Effects For A Series", and "Best Visual Effects" for a Gemini Award. Jewel Staite has been nominated for a Gemini Award in the category of Best Performance by an Actress in a Continuing Leading Dramatic Role for her performance in . Alan McCullough has been nominated for a Gemini Award in the Best Writing in a Dramatic Series category for his episode . has been nominated for a Gemini in the Best Achievement in Make-Up category.
== Cast ==
=== Main characters ===
Actor 	Character 	Number of episodes
Joe Flanigan 	Lt Col John Sheppard 	20 episodes
Amanda Tapping 	Colonel Samantha Carter	14 episodes
Rachel Luttrell 	Teyla Emmagan 	16 episodes
Jason Momoa 	Ronon Dex 	18 episodes
and David Hewlett	Dr. Rodney McKay 	20 episodes
=== Recurring characters ===
Actor 	Character 	Number of episodes
David Nykl 	Dr. Radek Zelenka 	11 episodes
Jewel Staite 	Dr. Jennifer Keller 	11 episodes
Kavan Smith 	Major Evan Lorne 	8 episodes
Chuck Campbell 	Chuck 	8 episodes
Christopher Heyerdahl	Todd 	6 episodes
Bill Dow 	Dr. Bill Lee 	4 episodes
Linda Ko 	Marie 	4 episodes
Torri Higginson 	Dr. Elizabeth Weir 	4 episodes
Connor Trinneer 	Michael Kenmore 	3 episodes
Michael Beach 	Colonel Abraham Ellis 	3 episodes
Jill Wagner 	Larrin 	2 episodes
Patrick Sabongui 	Kanaan 	2 episodes
Niall Matter 	Lt. Kemp 	2 episodes
Brenda James 	Dr. Katie Brown 	2 episodes
Gary Jones 	CMSgt. Walter Harriman 	2 episodes
Robert Picardo 	Richard Woolsey 	2 episodes
Mitch Pileggi 	Colonel Steven Caldwell	2 episodes
Christopher Judge 	Teal'c 	2 episodes
Paul McGillion 	Dr. Carson Beckett 	2 episodes
Yee Jee Tso 	Systems Tech 	2 episodes
Heather Doerksen 	Major Pat Meyers 	2 episodes
Johann Helf 	Nabel Golan 	2 episodes
Kate Hewlett 	Jeannie Miller 	2 episodes
== Episodes ==
Image	Title 	Number 	Airdate 	Planet(s) 	Race(s) 	Enemies
 	(Part 2 of 3) 	4.01 	September 28, 2007 	M12-578 	N/A 	N/A
 	Floating in deep space with the city's protective shield failing, the team must do all they can to keep Atlantis alive. A radical injury threatens Dr. Weir's life. 	Floating in deep space with the city's protective shield failing, the team must do all they can to keep Atlantis alive. A radical injury threatens Dr. Weir's life. 	Floating in deep space with the city's protective shield failing, the team must do all they can to keep Atlantis alive. A radical injury threatens Dr. Weir's life. 	Floating in deep space with the city's protective shield failing, the team must do all they can to keep Atlantis alive. A radical injury threatens Dr. Weir's life. 	Floating in deep space with the city's protective shield failing, the team must do all they can to keep Atlantis alive. A radical injury threatens Dr. Weir's life. 	Floating in deep space with the city's protective shield failing, the team must do all they can to keep Atlantis alive. A radical injury threatens Dr. Weir's life.
 	(Part 3 of 3) 	4.02 	October 5, 2007 	Asuras, M35-117 	Asuran 	Oberoth
 	Colonel Sheppard and his team embark on a risky mission to steal a Z.P.M. power module from the Replicators — but must rely on a compromised Dr. Weir to succeed. 	Colonel Sheppard and his team embark on a risky mission to steal a Z.P.M. power module from the Replicators — but must rely on a compromised Dr. Weir to succeed. 	Colonel Sheppard and his team embark on a risky mission to steal a Z.P.M. power module from the Replicators — but must rely on a compromised Dr. Weir to succeed. 	Colonel Sheppard and his team embark on a risky mission to steal a Z.P.M. power module from the Replicators — but must rely on a compromised Dr. Weir to succeed. 	Colonel Sheppard and his team embark on a risky mission to steal a Z.P.M. power module from the Replicators — but must rely on a compromised Dr. Weir to succeed. 	Colonel Sheppard and his team embark on a risky mission to steal a Z.P.M. power module from the Replicators — but must rely on a compromised Dr. Weir to succeed.
 	 	4.03 	October 12, 2007 	Earth, M35-117 	Satedan, Wraith, Unnamed 	Ara, Rakai, Tyre, Wraith Commander
 	When a group of Ronon's people enlist the team's help in raiding a Wraith weapons facility, Ronon reconsiders whether his future lies in Atlantis or with his friends. 	When a group of Ronon's people enlist the team's help in raiding a Wraith weapons facility, Ronon reconsiders whether his future lies in Atlantis or with his friends. 	When a group of Ronon's people enlist the team's help in raiding a Wraith weapons facility, Ronon reconsiders whether his future lies in Atlantis or with his friends. 	When a group of Ronon's people enlist the team's help in raiding a Wraith weapons facility, Ronon reconsiders whether his future lies in Atlantis or with his friends. 	When a group of Ronon's people enlist the team's help in raiding a Wraith weapons facility, Ronon reconsiders whether his future lies in Atlantis or with his friends. 	When a group of Ronon's people enlist the team's help in raiding a Wraith weapons facility, Ronon reconsiders whether his future lies in Atlantis or with his friends.
 	 	4.04 	October 19, 2007 	M35-117, M3X-387 	Crystal of M3X-387 	Crystal of M3X-387
 	During an off-world mission Colonel Sheppard unknowingly becomes host to an alien entity, which infects others in Atlantis and afflicts them with terrifying nightmares. 	During an off-world mission Colonel Sheppard unknowingly becomes host to an alien entity, which infects others in Atlantis and afflicts them with terrifying nightmares. 	During an off-world mission Colonel Sheppard unknowingly becomes host to an alien entity, which infects others in Atlantis and afflicts them with terrifying nightmares. 	During an off-world mission Colonel Sheppard unknowingly becomes host to an alien entity, which infects others in Atlantis and afflicts them with terrifying nightmares. 	During an off-world mission Colonel Sheppard unknowingly becomes host to an alien entity, which infects others in Atlantis and afflicts them with terrifying nightmares. 	During an off-world mission Colonel Sheppard unknowingly becomes host to an alien entity, which infects others in Atlantis and afflicts them with terrifying nightmares.
 	 	4.05 	October 26, 2007 	M35-117 	Traveler, Wraith 	Wraith Commander
 	Colonel Sheppard is captured by the inhabitants of a generational ship and their beautiful leader, who wish to use his ability to use Ancient technology for their own ends. 	Colonel Sheppard is captured by the inhabitants of a generational ship and their beautiful leader, who wish to use his ability to use Ancient technology for their own ends. 	Colonel Sheppard is captured by the inhabitants of a generational ship and their beautiful leader, who wish to use his ability to use Ancient technology for their own ends. 	Colonel Sheppard is captured by the inhabitants of a generational ship and their beautiful leader, who wish to use his ability to use Ancient technology for their own ends. 	Colonel Sheppard is captured by the inhabitants of a generational ship and their beautiful leader, who wish to use his ability to use Ancient technology for their own ends. 	Colonel Sheppard is captured by the inhabitants of a generational ship and their beautiful leader, who wish to use his ability to use Ancient technology for their own ends.
 	 	4.06 	November 2, 2007 	M35-117 	N/A 	N/A
 	When a virus causes amnesia in everyone except Teyla and Ronon, the Atlantis team must work together to find a cure before their memories fade entirely. 	When a virus causes amnesia in everyone except Teyla and Ronon, the Atlantis team must work together to find a cure before their memories fade entirely. 	When a virus causes amnesia in everyone except Teyla and Ronon, the Atlantis team must work together to find a cure before their memories fade entirely. 	When a virus causes amnesia in everyone except Teyla and Ronon, the Atlantis team must work together to find a cure before their memories fade entirely. 	When a virus causes amnesia in everyone except Teyla and Ronon, the Atlantis team must work together to find a cure before their memories fade entirely. 	When a virus causes amnesia in everyone except Teyla and Ronon, the Atlantis team must work together to find a cure before their memories fade entirely.
 	 	4.07 	November 9, 2007 	M35-117, New Athos 	Bola Kai 	Omal, Nabel Golan
 	During a visit to New Athos, Teyla and Dr. Keller find themselves on the run from a primitive tribe of warriors. 	During a visit to New Athos, Teyla and Dr. Keller find themselves on the run from a primitive tribe of warriors. 	During a visit to New Athos, Teyla and Dr. Keller find themselves on the run from a primitive tribe of warriors. 	During a visit to New Athos, Teyla and Dr. Keller find themselves on the run from a primitive tribe of warriors. 	During a visit to New Athos, Teyla and Dr. Keller find themselves on the run from a primitive tribe of warriors. 	During a visit to New Athos, Teyla and Dr. Keller find themselves on the run from a primitive tribe of warriors.
 	 	4.08 	November 16, 2007 	M2R-441, M35-117, Vedeena 	Wraith, Vedeenan 	N/A
 	The team meets a man with extraordinary prophetic abilities, who gives them a dark prediction about Atlantis's future. The Wraith seek a new alliance with Atlantis in their war with the Replicators. 	The team meets a man with extraordinary prophetic abilities, who gives them a dark prediction about Atlantis's future. The Wraith seek a new alliance with Atlantis in their war with the Replicators. 	The team meets a man with extraordinary prophetic abilities, who gives them a dark prediction about Atlantis's future. The Wraith seek a new alliance with Atlantis in their war with the Replicators. 	The team meets a man with extraordinary prophetic abilities, who gives them a dark prediction about Atlantis's future. The Wraith seek a new alliance with Atlantis in their war with the Replicators. 	The team meets a man with extraordinary prophetic abilities, who gives them a dark prediction about Atlantis's future. The Wraith seek a new alliance with Atlantis in their war with the Replicators. 	The team meets a man with extraordinary prophetic abilities, who gives them a dark prediction about Atlantis's future. The Wraith seek a new alliance with Atlantis in their war with the Replicators.
 	 	4.09 	November 30, 2007 	Earth, M35-117 	Wraith 	Henry Wallace
 	Rodney McKay goes in search of his sister on Earth after she is kidnapped by the head of a powerful corporation. 	Rodney McKay goes in search of his sister on Earth after she is kidnapped by the head of a powerful corporation. 	Rodney McKay goes in search of his sister on Earth after she is kidnapped by the head of a powerful corporation. 	Rodney McKay goes in search of his sister on Earth after she is kidnapped by the head of a powerful corporation. 	Rodney McKay goes in search of his sister on Earth after she is kidnapped by the head of a powerful corporation. 	Rodney McKay goes in search of his sister on Earth after she is kidnapped by the head of a powerful corporation.
 	 	4.10 	December 7, 2007 	Asuras, M34-227, M35-117, Niam's faction's planet 	Asuran 	Oberoth
 	A mysterious drone crashes into Atlantis, indicating that the Replicators may have found the city. But when Elizabeth Weir appears, the team realizes that the probe is just a part of a bigger mystery.	A mysterious drone crashes into Atlantis, indicating that the Replicators may have found the city. But when Elizabeth Weir appears, the team realizes that the probe is just a part of a bigger mystery.	A mysterious drone crashes into Atlantis, indicating that the Replicators may have found the city. But when Elizabeth Weir appears, the team realizes that the probe is just a part of a bigger mystery.	A mysterious drone crashes into Atlantis, indicating that the Replicators may have found the city. But when Elizabeth Weir appears, the team realizes that the probe is just a part of a bigger mystery.	A mysterious drone crashes into Atlantis, indicating that the Replicators may have found the city. But when Elizabeth Weir appears, the team realizes that the probe is just a part of a bigger mystery.	A mysterious drone crashes into Atlantis, indicating that the Replicators may have found the city. But when Elizabeth Weir appears, the team realizes that the probe is just a part of a bigger mystery.
 	 	4.11 	January 4, 2008 	Asuras, M35-117 	Asuran, Traveler, Wraith 	Asurans
 	With a plan to potentially extinguish the Replicator threat, the Atlantis team must seek an alliance with a fleet of Wraith ships. 	With a plan to potentially extinguish the Replicator threat, the Atlantis team must seek an alliance with a fleet of Wraith ships. 	With a plan to potentially extinguish the Replicator threat, the Atlantis team must seek an alliance with a fleet of Wraith ships. 	With a plan to potentially extinguish the Replicator threat, the Atlantis team must seek an alliance with a fleet of Wraith ships. 	With a plan to potentially extinguish the Replicator threat, the Atlantis team must seek an alliance with a fleet of Wraith ships. 	With a plan to potentially extinguish the Replicator threat, the Atlantis team must seek an alliance with a fleet of Wraith ships.
 	 	4.12 	January 11, 2008 	Asuras, M35-117, Unnamed 	Wraith 	Wraith Queen
 	The team finds their former Wraith ally's hive ship drifting in space, which leads them to a secret project that could turn the tide of a civil war. 	The team finds their former Wraith ally's hive ship drifting in space, which leads them to a secret project that could turn the tide of a civil war. 	The team finds their former Wraith ally's hive ship drifting in space, which leads them to a secret project that could turn the tide of a civil war. 	The team finds their former Wraith ally's hive ship drifting in space, which leads them to a secret project that could turn the tide of a civil war. 	The team finds their former Wraith ally's hive ship drifting in space, which leads them to a secret project that could turn the tide of a civil war. 	The team finds their former Wraith ally's hive ship drifting in space, which leads them to a secret project that could turn the tide of a civil war.
 	 	4.13 	January 18, 2008 	M35-117 	N/A 	N/A
 	An automated lockdown traps Atlantis personnel in various parts of the city, each of them hoping the others will come to their rescue. 	An automated lockdown traps Atlantis personnel in various parts of the city, each of them hoping the others will come to their rescue. 	An automated lockdown traps Atlantis personnel in various parts of the city, each of them hoping the others will come to their rescue. 	An automated lockdown traps Atlantis personnel in various parts of the city, each of them hoping the others will come to their rescue. 	An automated lockdown traps Atlantis personnel in various parts of the city, each of them hoping the others will come to their rescue. 	An automated lockdown traps Atlantis personnel in various parts of the city, each of them hoping the others will come to their rescue.
 	 	4.14 	January 25, 2008 	Harmony's planet 	Harmony's people, Genii 	Toran
 	Colonel Sheppard and Dr. McKay must protect a child princess on a pilgrimage before she can become queen, and learn that she has dangerous enemies threatening her life. 	Colonel Sheppard and Dr. McKay must protect a child princess on a pilgrimage before she can become queen, and learn that she has dangerous enemies threatening her life. 	Colonel Sheppard and Dr. McKay must protect a child princess on a pilgrimage before she can become queen, and learn that she has dangerous enemies threatening her life. 	Colonel Sheppard and Dr. McKay must protect a child princess on a pilgrimage before she can become queen, and learn that she has dangerous enemies threatening her life. 	Colonel Sheppard and Dr. McKay must protect a child princess on a pilgrimage before she can become queen, and learn that she has dangerous enemies threatening her life. 	Colonel Sheppard and Dr. McKay must protect a child princess on a pilgrimage before she can become queen, and learn that she has dangerous enemies threatening her life.
 	 	4.15 	February 1, 2008 	Earth, M35-117 	Human-form Replicator 	Poole's Replicator
 	While on personal leave on Earth, Sheppard and Ronon learn that scientists have engineered a human-form Replicator — who is now on the loose. 	While on personal leave on Earth, Sheppard and Ronon learn that scientists have engineered a human-form Replicator — who is now on the loose. 	While on personal leave on Earth, Sheppard and Ronon learn that scientists have engineered a human-form Replicator — who is now on the loose. 	While on personal leave on Earth, Sheppard and Ronon learn that scientists have engineered a human-form Replicator — who is now on the loose. 	While on personal leave on Earth, Sheppard and Ronon learn that scientists have engineered a human-form Replicator — who is now on the loose. 	While on personal leave on Earth, Sheppard and Ronon learn that scientists have engineered a human-form Replicator — who is now on the loose.
 	 	4.16 	February 8, 2008 	M35-117, M5V-801 	People of M5V-801 	N/A
 	McKay, Carter, and Keller are trapped in an underground chamber while on an off-world mission, with no apparent means of escape. 	McKay, Carter, and Keller are trapped in an underground chamber while on an off-world mission, with no apparent means of escape. 	McKay, Carter, and Keller are trapped in an underground chamber while on an off-world mission, with no apparent means of escape. 	McKay, Carter, and Keller are trapped in an underground chamber while on an off-world mission, with no apparent means of escape. 	McKay, Carter, and Keller are trapped in an underground chamber while on an off-world mission, with no apparent means of escape. 	McKay, Carter, and Keller are trapped in an underground chamber while on an off-world mission, with no apparent means of escape.
 	 	4.17 	February 15, 2008 	Earth, M35-117, M4F-788 	Jaffa, Wraith 	Wraith Commander
 	Teal'c visits Atlantis to counsel a headstrong Ronon, who is up for review by the I.O.A. But the two must work together when the Wraith invade the Midway space station in order to reach Earth. 	Teal'c visits Atlantis to counsel a headstrong Ronon, who is up for review by the I.O.A. But the two must work together when the Wraith invade the Midway space station in order to reach Earth. 	Teal'c visits Atlantis to counsel a headstrong Ronon, who is up for review by the I.O.A. But the two must work together when the Wraith invade the Midway space station in order to reach Earth. 	Teal'c visits Atlantis to counsel a headstrong Ronon, who is up for review by the I.O.A. But the two must work together when the Wraith invade the Midway space station in order to reach Earth. 	Teal'c visits Atlantis to counsel a headstrong Ronon, who is up for review by the I.O.A. But the two must work together when the Wraith invade the Midway space station in order to reach Earth. 	Teal'c visits Atlantis to counsel a headstrong Ronon, who is up for review by the I.O.A. But the two must work together when the Wraith invade the Midway space station in order to reach Earth.
 	(Part 1 of 2) 	4.18 	February 22, 2008 	Hoff, M2S-181, M35-117 	Athosian, Hybrid, Wraith 	Michael Kenmore
 	As a mysterious new illness sweeps through the Pegasus Galaxy, Teyla is convinced by a vision that the father of her child is trying to communicate with her. 	As a mysterious new illness sweeps through the Pegasus Galaxy, Teyla is convinced by a vision that the father of her child is trying to communicate with her. 	As a mysterious new illness sweeps through the Pegasus Galaxy, Teyla is convinced by a vision that the father of her child is trying to communicate with her. 	As a mysterious new illness sweeps through the Pegasus Galaxy, Teyla is convinced by a vision that the father of her child is trying to communicate with her. 	As a mysterious new illness sweeps through the Pegasus Galaxy, Teyla is convinced by a vision that the father of her child is trying to communicate with her. 	As a mysterious new illness sweeps through the Pegasus Galaxy, Teyla is convinced by a vision that the father of her child is trying to communicate with her.
 	(Part 2 of 2) 	4.19 	February 29, 2008 	M35-117, Unnamed 	Athosian, Hybrid 	Michael Kenmore
 	The team is shocked when an old friend, believed to be dead, miraculously returns to them. Teyla plans an escape from Michael's captivity. 	The team is shocked when an old friend, believed to be dead, miraculously returns to them. Teyla plans an escape from Michael's captivity. 	The team is shocked when an old friend, believed to be dead, miraculously returns to them. Teyla plans an escape from Michael's captivity. 	The team is shocked when an old friend, believed to be dead, miraculously returns to them. Teyla plans an escape from Michael's captivity. 	The team is shocked when an old friend, believed to be dead, miraculously returns to them. Teyla plans an escape from Michael's captivity. 	The team is shocked when an old friend, believed to be dead, miraculously returns to them. Teyla plans an escape from Michael's captivity.
 	(Part 1 of 2) 	4.20 	March 7, 2008 	Earth, M2S-445, M35-117, M4S-587 	Hybrid 	Michael Kenmore
 	Sheppard returns to Atlantis after a mission and finds the city abandoned, all systems dead — and instead of ocean, sand dunes as far as the eye can see. 	Sheppard returns to Atlantis after a mission and finds the city abandoned, all systems dead — and instead of ocean, sand dunes as far as the eye can see. 	Sheppard returns to Atlantis after a mission and finds the city abandoned, all systems dead — and instead of ocean, sand dunes as far as the eye can see. 	Sheppard returns to Atlantis after a mission and finds the city abandoned, all systems dead — and instead of ocean, sand dunes as far as the eye can see. 	Sheppard returns to Atlantis after a mission and finds the city abandoned, all systems dead — and instead of ocean, sand dunes as far as the eye can see. 	Sheppard returns to Atlantis after a mission and finds the city abandoned, all systems dead — and instead of ocean, sand dunes as far as the eye can see.
== References ==
fr:Stargate Atlantis Saison 4