Dr. Paul Morrison
Arnold King
Austrian Sergeant at Tavern
Alan Duncan
Charles
Harry Henderson (2 episodes)
Charles Giffen
Henchman Montana (1 episode)
Cliff Gage
Tom Adams, Smith's Attorney
Maj. Bolton
Matt
Jim Caldwell
Daniel Boone
Joe Hanson
George Hart
Tom Conway
Count D'Orsini (uncredited)
Jeff Stuart
Jeffrey Westcott
Wayne Morgan
Cleve Blunt
Gerald Tyler
J. Roger Mace
Radio Announcer (uncredited; voice)
Danny Lee
Richard Corbett
Frank Garrison
Larry O'Ryan
Robert 'Bob' Duval
Michael Reed
Ted Allison
Harvey Jones
Lt. Rawlins
Horace Crump aka Bob Sterling
Oliver
Lt. Barton
Herman - Desk Clerk (uncredited)
Jimmy Barbour
Bert Thomas
Paul Myron
David Ritchie
Young Sailor
John Saunders
Phil Sheridan
Jimmy Lansing
Man (uncredited)
Student (uncredited)
Reporter When Knute is Ill (uncredited)
Depositor (uncredited)
Martin Burke
Gerald Wilson
Johnny Frey
Assistant Director (uncredited)