John Larroquette

as Dan Fielding (47 episodes), Producer

as Narrator (voice)

as Self (1 episode)

as Jay Reece (5 episodes)

as President James Stevens (1 episode)

as Older Alex (13 episodes)

as Gavin Firth (5 episodes)

as Ray LePine

as Jenkins (42 episodes)

as Self (1 episode)

as Dr. Nigel Vaughn (1 episode)

as Professor Morasco

as Mayor (voice) (1 episode)

as Martin Gold

as Sam Boedecker

as Commander Jenkins

as Donovan (1 episode)

as Tomar-Re (voice)

as Bud McGrath (2 episodes)

as Frank (1 episode)

as Vaughn Smallhouse

as Roan Montgomery (2 episodes)

as Bob Webber (voice) (1 episode)

as Mike McBride, Director

as Mike McBride, Director