character - Eddie Carter

character - Dr. Craig Mitchell

character - John Ainsworth

character - Dr. Steven Russell

character - Daubeney Carshott

character - Capt. Jerry Brown / Jim Lofton

character - Doctor Marshall

character - Dr. Marshall, 'The Scorpion'

character - Curtis Powell

character - Agent Ted Kelly

character - Owen Rogers

character - Frank Gordon

character - Bruce Donaldson

character - Lieut. Dan Burke

character - Ted 'Rip-Roaring' Riley

character - Andrew Robinson

character - Capt. John Kent

character - Graham Smith

character - Henry Townsend

character - Attorney Johnson

character - Jimmy Milligan

character - Robert Thornton

character - Daniel Treve

character - Bill Ramsey

character - Tony Hill

character - Bart Wallace

character - Dr. Robert Sanford

character - Prince Nicholas Petroff

character - Fred Garlan

character - Derek

character - Bill

character - George Edward Blaine

character - Jack

character - Marshall Jones

character - Johnny Stark

character - Dr. Bradford

character - Nikolai Roget

character - Bobby Bailey

character - Philip Lennox

character - Cal

character - Don Manning

character - Hayden Eaton

character - Jerry Booth

character - Franz Pless

character - John Barton

character - Jerry

character - Felipe

character - Gil Barry

character - Theodore Wayne

character - Richard Castleman / Danny Rowland

character - Waite Lifter

character - Julian Perryam

character - Donald Marshall

character - Philip Collett

character - Phil Douglas

character - Rance Conway

character - Ned Thayer

character - Blair Farquar

character - Charlie Jordan

character - Edward E. Malone

character - The Hero

character - Lionel Tressilian

character - Dick Forrest

character - Jack Hare

character - John Trevor

character - Sam Gladding

character - Harvey Livermore

character - Oliver Wendell Blaine

character - Cody Jacques

character - Frederick Graves

character - David Beresford

character - John Trott

character - Dick Revel

character - Himself

character - Luther Flint

character - Roger Moran

character - John King

character - Roland

character - Tad Worden

character - Jules Patricia

character - Reporter (uncredited)