Jonas Quinn

Jonas Quinn
Corin Nemec as Jonas Quinn in a promotional photo for Stargate SG-1 Season 6.
First appearance	"Meridian" (SG-1)
Last appearance	"Fallout" (SG-1)
Portrayed by	Corin Nemec
Information
Species	Human from Langara

Jonas Quinn is a fictional character in the Canadian-American television series Stargate SG-1, a science fiction show about a military team exploring the galaxy via a network of alien transportation devices. Played by Corin Nemec, Jonas is introduced in the season 5 episode "Meridian." Jonas fills Daniel Jackson's empty spot on the SG-1 team in season 6 and the beginning of season 7, and last appears in the mid-season 7 episode "Fallout".

Nemec's character replaced Daniel Jackson (portrayed by Michael Shanks) during season 6 after Shanks had left the show amid controversy after season 5. The producers based Jonas's motivation to join Stargate Command on his momentary reluctance to actively prevent Daniel's death, and his feelings of responsibility afterwards. Jonas was slowly integrated into the story in a prolonged transition stage over the first half of season 6. Nemec was open to continue playing Jonas Quinn after season 6, but a new contract was reached with Michael Shanks for Daniel to return in season 7. The role of Jonas was reduced to recurring status in season 7.

Jonas Quinn is introduced in the penultimate season 5 episode "Meridian" as a scientist of the human nation of Kelowna on Langara, a planet with an industrial level comparable to Earth of the 1940s, and that is also locked in a cold war with two rival states. He is an exceptionally quick learner, which becomes useful in memorizing SG mission reports and earth culture. The Kelownans are experimenting with naqahdriah (an unstable but extremely powerful native element related to naqahdah) to build a bomb against their two rival nations, Terrania and the Andari Federation. Jonas is present when SG-1 team member Daniel Jackson gets radiation-poisoned with naqahdriah in an attempt to prevent a catastrophe in Kelowna, but when the Kelownan leaders respond with glee to Daniel's imminent death, Jonas steals a small amount of naqahdriah and offers it to Earth for more peaceful uses. Still wracked by guilt in the season 6 premiere "Redemption" over his hesitation to step in, Jonas helps Major Samantha Carter find a solution to save Earth from an attack by the Goa'uld Anubis. Although Colonel Jack O'Neill is reluctant to add a new fourth member to SG-1, he allows Jonas to join the team, partly to prevent a Russian from being assigned.