James Daly

as RSM Boyce

as Arthur Huston

as Narrator

as The President

as Dr. Redding

as Capt. Nicolas Augustus

as Paul Lochner

as Dr. Paul Lochner

as Ray Ritchie

as Uncle Max

as Uncle Max

as il capitano Mike Liston

as Dr. Honorious

as Jack Dunois

as Judge Lockhart

as Alan Landers

as Gen. Samuel Arlington Concannon

as Carl Wilson / Josef Gort

as Flint

as Stephen Fitzgerald

as James Butler

as Jerry Haines

as George Jones

as Michael Ballinger

as Arthur Brame

as Capt. Cole

as Sergeant Joe Trapp

as Morgan Bannion

as U.S. Major William Taggert

as Gart Williams

as Tom Ditmar

as Lt. Col. Herbert White

as John Crowley

as Tom Bryan

as George Norren

as Charley

as Major Gaylord

as Judd Killian

as Sam Wayne

as Al Hayes

as Narrator

as St. Clare

as Colonel Billy Mitchell

as General Robert E. Lee

as Bill

as Barabbas

as Owen Wister

as Dr. O'Meara

as Dunois

as Interne (uncredited)

as Gorden

as Major Gaylord

as Jim Briscoe

as Sergeant Pat Boyle

as Mr. White

as Professor Amos Tucker

as A cartoonist

as Rufus Jackson

as Greg Chandler

as Scott Martin

as Deering

as Bill Tanner