Dr. Kurin
T. C. Jeffords
General Ostrovsky
Mr. Nat Miller
The Sinkiller
Ephraim Wells
Edward Armstrong
Ling Tan
Dr. Kurin
Narrator
Ambassador Joseph E. Davies
Dr. Martin Stensgard
Uncle Sam 'U.S.'
Doc Holliday
Narrator
Jerry Cohan
Bartender (uncredited)
MacKenzie Scott
Sir Guy Charteris
Thursday Ragan
Captain Jacoby (uncredited)
Mr. Scratch
Torpenhow
Ethan Wilkins
Sam Dodsworth
Cecil John Rhodes
President of the United States
Sgt. Benjamin E. Walsh
Edwin J. Bennett ("The Professor")
Barney Dolphin
Mayor Dushan Radovic
Lieut. Comdr. T.J. Toler USN
Hon. Judson Hammond - The President of the United States
Alfred Davidson
Flint
Thomas Dickson
Judge Andrew J. Moffett
Pow Tarleton
Capt. Jim Fitzpatrick
Frame 'Saint' Johnson
Captain Corlaix
Seth Law
Jack Bannister
District Attorney Whitlock
Judge Walter Huston (uncredited)
Mark Brady
Abraham Lincoln
Gregory Platoff
Pancho Lopez
Joe in Clark & White's Office (uncredited)
Trampas
Robert Rossiter
Abraham Lincoln
Wickland Snell
The Convict