Mitch was a member of DHARMA Initiative security. When Stuart, Horace, Phil, and other personnel were interrogating LaFleur and Juliet about where Kate and Jack ran off to in the jungle, Mitch informed them that Kate, Jack, and Hugo were three last-minute additions to the sub manifest. He later escorted LaFleur and Juliet to the Galaga. ("Follow the Leader")
After the submarine went underwater, he passed out sedatives to the passengers. When he reached Juliet, she knocked him out and took his keys in order to free herself and the others from their handcuffs. ("The Incident, Part 1")
- In the casting call Mitch was described as "Any ethnicity, 30s. A security man with enough intelligence and physical menace to be good at his job, but he's not moving into management."
- After Lost, actor Kevin Chapman starred with Michael Emerson in the JJ Abrams television series Person of Interest