Jeff Tracy (voice)

Jeff Tracy / Professor Heinz Bodman (voice)

Jeff Tracy / Commander Norman / Interceptor One Pilot (voice)

Robert Hathaway

Escalus, Prince of Verona

Captain

Lord St Erth

David Garrick

The Investigator (voice)

Ezra Meade

Balkov

Col. Golchenko

Jeff Tracy (voice)

Jeff Tracy (voice)

German Officer #1

Narrator / Parisian Radio Operator (voice) (uncredited)

Lloyd Greener

Mark Lemming

Tom

Commander Jenkins (uncredited)

Larry Stanford

Dr. Morrow

Willy Reichel

Dr. Rene Normand

Mr. Washington

Arthur Hayes

Uncle George

Midger

Tony Roscoe

Regan (uncredited)

Miller

Lady Anthea's Husband (uncredited)