Title: The Orville
Content:  the Orville's elevators and makes unsuccessful attempts to befriend fellow crew members • Rachael MacFarlane as the voice of the Orville computer • Ron Canada as Admiral Tucker • Kelly Hu as Admiral Ozawa • Chris Johnson as Cassius, a teacher on board the Orville who had a relationship with Grayson until they broke up during season 2 • Blesson Yates as Topa, Bortus and Klyden's son • Kyra Santoro as Ensign Jenny Turco, a member of the engineering staff in a relationship with LaMarr • Ted Danson as Admiral Perry • Rena Owen as Heveena, a Moclan woman
Title: The Orville (season 2)
Content: Michaela McManus as Teleya/Lt. Janel Tyler ; Robert Picardo as Ildis Kitan ; Molly Hagan as Drenala Kitan ; Candice King as Solana Kitan ; John Billingsley as Cambis Borrin ; Jason Alexander as Olix ; Patrick Warburton as Lt. Tharl ; Bruce Willis as Groogen (uncredited) ; Carlos Bernard as	Capt. Marcos ; Mackenzie Astin as Lt. Orrin Channing ; Tim Russ as Dr. Sherman ; Leighton Meester as Laura Huggins ; Marina Sirtis as a teacher ; F. Murray Abraham as hearing speaker (uncredited) ; Tony Todd as a Moclan delegate ; Rena Owen as Heveena ; Robin Atkin Downes as Krill Captain Jackazh 
Title: The Orville (season 1)
Content: Victor Garber as Admiral Halsey ; Chad Coleman as Klyden ; Norm Macdonald as the voice of Lt. Yaphit 
Title: The Orville
Content:  In July 2016, MacFarlane's role was revealed to be Ed Mercer, the captain of the Orville, while Adrianne Palicki had been cast as Kelly Grayson, Ed's ex-wife and newly appointed first officer of the Orville, and Scott Grimes (who voices Steve Smith on American Dad!, another show created by MacFarlane) was cast as Gordon Malloy, Ed's best friend whom he has assigned to pilot the Orville. In August Peter Macon and J Lee were cast as series regulars. In October Halston Sage and Penny Johnson Jerald joined the cast while Mark Jackson was added in December. In April 2017, Chad L. Coleman was added as a series regular and Larry Joe Campbell in a recurring role. At San Diego Comic-Con in July 2017, MacFarlane said that Charlize Theron would guest-star in an episode. The two had previously co-starred in A Million Ways to Die in the West. Theron appeared in the series' fifth episode "Pria". In February 2018, Jessica Szohr was cast as a regular for season two and Chris Johnson in a recurring role. In November 2019, Anne Winters was cast as a regular for season three.
Title: The Orville (season 3)
Content: Chad Coleman as Klyden ; Norm Macdonald as Lt. Yaphit (voice) 
Title: The Orville (season 2)
Content: Victor Garber as Admiral Halsey ; Chad Coleman as Klyden ; Norm Macdonald as the voice of Lt. Yaphit ; BJ Tanner as Marcus Finn ; Kai Wener as Ty Finn ; Mike Henry as Dann ; Chris J. Johnson as Cassius ; Blesson Yates as Topa ; Kyra Santoro as Ensign Jenny Turco ; Ted Danson as Admiral Perry 
Title: The Orville
Content:  particular focus on Mercer after he destroyed her ship • Steven Culp as Wilks • Brian Thompson as Drogen, a survivalist on a planet where Finn, Isaac and Finn's children crash in "Into the Fold" • Ralph Garman as Kanoot, a karaoke announcer on the Orville • Robert Picardo as Ildis Kitan, father of Alara Kitan • Molly Hagan as Drenala Kitan, mother of Alara Kitan • Candice King as Solana Kitan, sister of Alara Kitan • John Billingsley as Cambis Borrin, the angry father of one of Ildis Kitan's students • Jason Alexander as Olix, an alien bartender on the Orville • Patrick Warburton as Lt. Tharl, an alien who temporarily takes over 
Title: Orville the Duck
Content:  a group of entertainers waiting to meet the royal family. In another episode, Orville was portrayed as an out-of-work actor shopping at a supermarket, played by Matt Lucas, dressed as an oversized version of Orville, and had a regularly pitched voice. Harris and Orville have also made an appearance on Channel Four's Banzai. In 2005, both Harris and Orville appeared in the Channel 5 reality TV show, The Farm and went on to win it. They also appeared in the video for Tony Christie's "Is This the Way to Amarillo", which was re-released in that year. In May 2009, they made a cameo appearance 
Title: The Orville
Content:  • Rob Lowe as Darulio, the Retepsian archaeologist whose affair with Kelly ended her marriage with Mercer. He came back to the ship to consult during a crucial research mission, where his pheromones caused Mercer and Grayson to be attracted to him and Claire to have sex with Yaphit (although he declines to confirm if his pheromones were the reason for Grayson's original affair). • Brian George as Doctor Aronov, the leader of the Epsilon II science station • Jeffrey Tambor as Ben Mercer, Ed Mercer's father • Holland Taylor as Jeannie Mercer, Ed Mercer's mother • Jonathan Adams as the Moclan arbitrator • Robert Knepper as Hamelac • Giorgia Whigham as Lysella, a 
Title: The Orville
Content:  • Victor Garber as Fleet Admiral Halsey, Mercer's superior and old friend of Grayson's father • Chad Coleman as Klyden, Bortus's mate and father of their child. He revealed that he was actually born a female and had the procedure to correct his gender when he was an infant, only learning about it when he was first examined by a non-Moclan doctor after joining Bortus on his first ship assignment. • Norm Macdonald as the voice of Lieutenant Yaphit, an amorphous, gelatinous, shapeshifting engineer on the Orville, who repeatedly attempts to obtain a date with Dr. Finn,  and frequently flirts 

Question: who plays the robot on the orville show?
Answer: Mark Jackson.