Frank Shannon

as Dr. Zarkov

as Dr. Hans Zarkov (archive footage)

as Dr. Zarkov

as Train Station Gateman (Uncredited)

as Prof. Davidson (uncredited)

as Professor Davidson

as Dr. Hayden

as Police Commissioner

as Senator (uncredited)

as McDowell

as Hammond

as Mr. O'Malley - Captain of the Nova Scotian (uncredited)

as Second Man with California Gold News

as Sweeney

as Sheriff

as Dr. Zarkov

as Construction Supervisor at Elevator

as Frank, the Bartender (uncredited)

as Kelsey (Uncredited)

as Inspector McTavish

as Captain McTavish

as Old Man (uncredited)

as Police Capt. McTavish

as Police Lieutenant (uncredited)

as Police Captain McTavish (uncredited)

as Dr. Alexis Zarkov

as Mac (uncredited)

as Captain McTavish

as Duke Slattery - Policeman with Warrant

as Dr. Alexis Zarkov

as Dr. Zarkov

as Dr. Hans Zarkov

as Minor Role (uncredited)

as Capt. McTavish

as Police Sergeant at Jail (Uncredited)

as Captain McTavish

as Desk Sergeant (uncredited)

as Sheriff Anderson

as Captain Stafford

as Dr. Hans Zarkov

as Chaplain (uncredited)

as Mr. Holt

as Detective Hewitt (uncredited)

as Dan O'Reilly

as Police Sergeant

as Mr. Farley

as Mike

as Agent Joe

as Police Chief at Lodge (uncredited)

as Prison Warden

as The Burglar, Holtz aka Jack Dunning

as Badger

as Judge Bradford

as Sir John Mansfield

as Terrence O'Malley

as Phil Rourke

as Detchard