Peter Breck

King Leonidas

Johnny Barrett

Tibor

Stacey Gouge

Dr. Paul M. Chapman

Ben Miranda (uncredited)

Chip

Sheriff Hatch

Chambers

Sahm-Ir

Mr. Watson

Steve Curan (archive footage)

Johnny Barrett (archive footage) (uncredited)

Russian Officer

Steve Curan

-

Frank Brennan

Bob Mooney

Ted Grover

Ross Gilmore

Wellington

Avery Porter

Steve Curan

-

Stephen Tremayne

-

-

Ward Bannister

Sundance Kid

-

-

-

-

-

-

Mike Palmer

Silver Cloud

-

Sam Dixon

-

Clay Culhane

Nick Barkley

Sen. Orville

-

Clay Elliot

Hull

-

George Noland

Dr. Ted Dietrich

Wiley Bondesen

-

Lt. John Stickney

Senator Weyburn

-

Farmer Brown (voice)

Kendal's Father

Harry Cordel

Jess Carver

-

Fly Hoyt

-

-

-

-

Dr. Halverson

Jesse Keller