Jason was a minor Other who, on numerous occasions, aided Pickett, Ben, and Ryan Pryce. Jason was credited as a character in some episodes, while in others he appeared as a part of the background cast.
On the Island
Days 70-91 (Season 3)
Jason was first seen when he assisted Matthew in the Hydra operation room. Jason told Sawyer to bite down on a stick, "for the pain" and held him down. He later accompanied Ben and Sawyer on their journey to the Hydra Island lookout. ("Every Man for Himself")
Ivan, Jason and Danny chasing "Austen" and "Ford". ("Not in Portland")
Jason and Danny Pickett watched Jack perform surgery on Ben, however Pickett took this opportunity to leave the operating room to kill Sawyer, despite Jason's suggestion not to. Pickett and Jason made their way to the cages area and held Kate at a gunpoint, so she would not try to prevent Pickett from shooting Sawyer. ("I Do")
However in an unexpected movement, Pickett and Jason were beat up and left unconscious locked in Sawyer's cage by Kate and Sawyer. After being locked in the cages with Pickett and being freed by Ivan the three of them caught up with the fugitives on the beach, but failed to catch them. They continued their chase to the part of the Hydra compound, where they found Aldo on the floor, informing them that Kate, Sawyer, and Alex had been here and had freed Karl. ("Not in Portland")
Weeks later, Jason was seen at the Others' camp when Ben came back from taking Locke to see Jacob. ("Greatest Hits")
Sayid breaks Jason's neck during the beach raid. ("Through the Looking Glass, Part 2")
Jason was one of Pryce's "ten best men" who took part in the raid on the castaways' camp. He survived the initial explosions of the tents, and helped to capture Jin, Sayid, and Bernard. While Hurley ran Pryce over with the DHARMA van, Sayid tripped Jason, and with his legs, broke Jason's neck, killing him. ("Through the Looking Glass, Part 1")
- Several days after Jason's death, a similar-looking Other was shown at Richard's camp. The character was also played by Ariston Green. ("There's No Place Like Home, Part 2")
- In "The Variable", Daniel is told to put on a hard hat by a DHARMA worker played by Ariston Green, however the producers have stated there is no connection.
- Jason is one of the eight recurring characters whose last names we don't know, the other seven being Phil, Bram, Zack, Emma, Omar, Neil, and Zoe.