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Arthur FranzRichard "Reef" Holloway
Dick ForanDan Wendover
Brett HalseyCarl Neilson Jr.
Tom ConwayIan Hunt
Paul DubovDavid Milburn
Bob Steele"Grif" Griffin
Victor VarconiClifford Kent
Joi LansingJulie
Selmer JacksonAdmiral Terhune
Jack MulhallJustin Murdock
Jean MoorheadHelen Milburn
Richard TylerFrogman Carney
Kenneth BeckerFrogman Powell
Sid MeltonChester TuttleFrank WatkinsWatkinsPat MichaelsNarratorJohn HilliardSaucer Voice (voice)
Edmund CobbPasserby (uncredited)
Frank LackteenPasserby (uncredited)
