Milton Crawford (5 episodes)

The Evil Wizard

Wilzig (1 episode)

Self - Guest (1 episode)

Brainiac (voice) (6 episodes)

Reg

Self (1 episode)

Dr Leland Townsend (50 episodes)

Abo of Fossanova - The Abbot (8 episodes)

Morton Norton (2 episodes)

Cayden James (7 episodes)

Narrator (3 episodes)

Co-Producer

Joker (voice)

Joker (voice)

Alpha Nanite (voice)

Harold Finch (103 episodes)

Dr. Archibald Monev/Dr. Venom (voice) (1 episode)

Andy Fitzgerald (1 episode)

Zep Hindle (archive footage) (uncredited)

Benjamin Linus

Steve Harper

Self (1 episode)

Charlie New

Self (1 episode)

Frank Nelson

Benjamin Linus (70 episodes)

Henry Gale (8 episodes)

Zep Hindle

Harrigan

Marty Manning (1 episode)

Gorilla

Zep Hindle

Allan Shaye (1 episode)

Victor

F. Thomas Erickson (1 episode)

Stuart Wesmar (1 episode)

Oliver Martin (1 episode)

Josh

Gerry Rankin (1 episode)

Reverend

(1 episode)

William Hinks (5 episodes)

William Hinks (voice) (1 episode)

Man in Bar (1 episode)

Mr. Putnam (1 episode)

Gallery Doorman

Tom

Bosco

Arnold Dudley (1 episode)

Arnold Dudley

Burtom's Assistant

Michael

Clown