Professor Stephen Castle

Robert

Self (1 episode)

Self (1 episode)

Self (1 episode)

Russell Sprout

Paddy Door Man

Dr. Peterson (4 episodes)

Principal (1 episode)

Mr. Olsen (1 episode)

Mel (1 episode)

Dr. Dennis Keil (1 episode)

Mike Foreman (1 episode)

Civil War Major (1 episode)

Shel Keneally (1 episode)

Charles Wallace (1 episode)

Warden (1 episode)

Newburg's Attorney (1 episode)

Maxwell Forrest (14 episodes)

Klingon Captain (1 episode)

Kreetassan Captain (2 episodes)

Captain Maximilian Forrest (1 episode)

Agent Myers (1 episode)

Sgt. McNamara (1 episode)

Greg Mitchell (1 episode)

Cop (1 episode)

Mr. O'Lare (1 episode)

Sheriff Collins

Marty Hemmet (1 episode)

Judge Williams (1 episode)

Lane Black (2 episodes)

(1 episode)

(1 episode)

Mr. Hassick (1 episode)

Fred Briggs (1 episode)

Painter

Police Officer (1 episode)

Security Guard (2 episodes)

Hall (1 episode)

Tony (1 episode)

Captain (2 episodes)

Minister (1 episode)

Trooper

Telek R'Mor (1 episode)

Alpha-Hirogen (2 episodes)

Korath (1 episode)

Lansor / Two of Nine (1 episode)

Vidiian Captain (1 episode)

(1 episode)

Blackhawk Pilot

Major (1 episode)

Gul Danar (1 episode)

Seskal (2 episodes)

Mr. Breskin (2 episodes)

Lt. Coleman (2 episodes)

Gary Hayes

Fred Trump (1 episode)

Paul Bettencamp / Alien

Uncle Val (1 episode)

Mr. Osborn (1 episode)

Commander Korris (1 episode)

(1 episode)

(1 episode)

Rob O'Connell (1 episode)

Guard

Guard (1 episode)

Andrew (1 episode)

Cowboy

(1 episode)

(2 episodes)

Captain Cummings

Reporter

Eric (1 episode)

(1 episode)

Jefferson Institute Security Guard (uncredited)

Tom Prince

Heller