David Conrad

as Dan

as Mark

as Mark Jane

as Mike Schaeffer (1 episode)

as Ian Quinn (8 episodes)

as Narrator

as Ben Wilson (2 episodes)

as Ted

as Judge Clark Willard (1 episode)

as Frank Kelly (1 episode)

as Roger Coldon

as Ryan Bradford

as Self - Guest (1 episode)

as Doug Phillips

as Francis Kramer

as Jim Clancy (62 episodes), as Jim Clancy / Sam Lucas (23 episodes), as Sam "Jim" Lucas (22 episodes)

as Jim Clancy/Sam Lucas (1 episode)

as Trap

as Dr. Marty Hamilton (1 episode)

as Michael Mendelson (18 episodes)

as Det. Ed Exley

as Dr. Phil Reed

as Gary Chapman (1 episode)

as Dave Fields (7 episodes)

as Lt. / Cmdr. / Capt. Hanks