Invasion

Invasion is an ABC science-fiction television series that premiere on September 28, 2010. The series aired six seasons and 106 episodes, concluding on May 15, 2016.
== Premise ==
Invasion follows the ruins of Washington D.C. in the aftermath of a supposed alien invasion. As multiple groups of survivors rise up, the secrets behind the invasion are revealed, changing the dynamics every episode.
===Season One===
Throughout the season, the survivors deal with several struggles such as a splinter group splitting off, lack of supplies, and a disease outbreak. Adam manages to gain the support of most everyone, while Alissa learns she is pregnant. Grace is outed as an alien and returns to the mothership, putting Isaac into a coma in the process. Derek and Maya also begin a relationship. Colin and Sara go after Grace, and she returns with them, but Alissa is taken in her place.
===Season Two===
A new group of survivors is revealed, and when they meet a National Guardsman who made his way in, they keep the secret to themselves when integrating with the main group. Alissa is returned to the group, but learns that Adam is not the father. Grace is killed, causing Colin to seek revenge, and joins Elena, Ben, and Hayden on their journey to the mothership, which is more hidden than before. When the government gets through the barrier, the aliens abduct and kill them, while the returned disease takes out half of the survivors. Derek and Maya also seek out all the children that have gone missing and discover them to be a part of the aliens' experiment, saving one. Isaac and Sara enter a relationship. Colin sacrifices himself to get the others off the ship before it leaves, while Alissa discovers the aliens impregnated her.
===Season Three===
Elena, Ben, and Hayden inform Adam, Alissa, Sara, Isaac, Derek, and Maya of the outside world. As the group continues to dwindle as more people die off, Derek and Maya adopt Mary when her mother dies. Adam struggles to learn about Alissa's child's true parentage and it strains their relationship. Grace helps Isaac relocate the alien's ship, but he is abducted and returned as a different person. This causes him to shoot and kill Maya, before he returns to being himself, but Derek cannot forgive him. Hayden realizes the government is contacting him and they send in a rescue squad, but the aliens make it nearly impossible for either group to make it to each other. Alissa, Sara, Derek, Ben, Hayden, Mary and thirteen others make it to the squad and promise to come back for Adam, Isaac, Elena, and the fifty others, but after a year, they have not returned yet, and it is only Adam, Isaac, Elena, and three others.
===Season Four===
After a year, Alissa is living off of severance payments while raising Eve, and Sara has settled down with a new man. Derek is also taking care of Mary still, and Ben has become an award-winning author for detailing his experiences in the HQ. To them, Adam and the others were never found, but inside D.C., we see the remaining survivors struggling to survive. They make it through the fog with heavy practice but discover the others are in a virtual reality set up by the aliens. They manage to rescue them, and they are devestated to learn it was all fake, but Alissa is overjoyed to see Adam, until they realize Eve has been with the aliens for six months since her birth. Sara is unable to be back with Isaac due to her relationship, while Carrie, Xander, and Will have a difficult time adapting to the old group. Derek begins a relationship with Carrie. Adam and Alissa manage to get Eve back, but a new weapon the aliens use kills Will and sends half the group, including Alissa, Sara, Isaac, Mary, Hayden, and Xander, forward in time to 2035, twenty-three years into the future.
===Season Five===
In 2035, the group is quickly shrunk down to just Alissa, Sara, Isaac, Mary, Hayden, and Xander, as a mysterious group of mercenaries kill the seven others. The six manage to make allies with a separate group, led by an adult Eve. She reveals that after they left, the survivors in 2012 managed to stop the aliens, but the government left a blackmark on the city and forced the group into quarantine. Eve managed to escape when she was old enough and got a group of allies and they have been combating the government forces to save the others ever since. The group manages to help Eve stop the government and they are able to return home thanks to the future technology, and they promise to make the future better. In 2012, the group there (Adam, Derek, Elena, Ben, and Carrie) manages to stop the aliens once and for all, but at the cost of Carrie and eventually Derek's lives. Adam promises to take care of Mary. Both groups are reunited, just as the government rolls in.
===Season Six===
The remaining fifteen survivors combat the government, and with future Eve's advice, they manage to stop them and leak everything to the public, ensuring their safety, but it costs Xander and eventually Sara and Isaac their lives. Adam, Alissa, Eve, and Mary retire to live normal lives. Elena joins Hayden in the National Guardsman, and Ben publishes his account of the events, while in the future, everything is normal.
== Cast ==
*Josh Holloway as Governor Adam Tyler; the governor of Washington D.C., who becomes the de facto President.
*Danielle Nicolet as Alissa Tyler; Adam's wife, and his personal assistant.
*Amy Acker as Sara Tyler; Adam's sister who tries to stay out of the spotlight.
*Mike Vogel as Derek Marsh; a police officer trying to live up to his father's image. (seasons 1-5; special guest season 6)
*Nick Zano as Colin Brody; Derek's partner who had a previous relationship with Sara. (seasons 1-2; special guest season 6)
*Cobie Smulders as Maya Davidson; a criminal on trial who escapes in the chaos. (seasons 1-3; special guest star seasons 5-6)
*Yvonne Strahovski as Grace; an alien disguising herself as an ally. (seasons 1-2; special guest star seasons 5-6)
*Tom Cavanagh as Isaac Knight; a conspiracy theorist and science professor.
*Alyssa Diaz as Elena Gutierrez; (seasons 2-6)
*John David Washington as Ben Raymond; (seasons 2-6)
*Toby Kebbell as Hayden Foster; (seasons 2-6)
* as Mary Davidson-Marsh; (seasons 3-6; guest season 2)
*Hayden Panettiere as Carrie Anderson; (seasons 4-5; special guest season 6)
* as Xander Evans; (seasons 4-6)
* as Will Simon; (season 4)
*Kylie Bunbury as Eve Tyler; (season 5; special guest season 6)
* as Felicity; (season 6; recurring season 5)
*Clancy Brown as General Oliver Bentley; (season 6)
== Series overview ==
Season	Episodes	Premiere 	Finale
1 	22 	September 28, 2010	May 17, 2011
2 	22 	October 11, 2011 	May 15, 2012
3 	18 	January 8, 2013 	May 7, 2013
4 	18 	January 7, 2014 	May 13, 2014
5 	13 	February 3, 2015 	April 28, 2015
6 	13 	March 8, 2016 	May 15, 2016