Spudvisor
Sebastian Cabot

Commissioner Andrew Crippen (39 episodes)

Cameron Mitchell

John Lackland / Narrator (39 episodes)

Don Megowan

Captain Huckabee (39 episodes)

Don Haggerty

Frank Butcher (1 episode)

Wharton (1 episode)

Robert J. Wilke

Jason Despol (1 episode)

Bill Winters (1 episode)

Cesar Romero

Jaoquin Perez (1 episode)

Krasny (1 episode)

Frank Silvera

Juan Dominguez (1 episode)

Anton Varda (1 episode)

Anne Helm

Diane Carter (1 episode)

Laine (1 episode)

Forrest Lewis

Carson Brewster (1 episode)

Dub Taylor

Pete Dibley (1 episode)

Maxwell Reed

Geoffrey Stapleton (1 episode)

Michael Pate

Ricardo Selas (1 episode)

Glynis Johns

Rosalind Metcalf (1 episode)

Howard Morris

Melvin M. Murney (1 episode)

Alan Caillou

Robert Herrick (1 episode)