Brass Bancroft and his sidekick Gabby Watters are recruited onto the secret service and go undercover to crack a ruthless gang that smuggles illegal aliens.

Ronald Reagan
as Lt. 'Brass' Bancroft

Ila Rhodes
as Pamela Schuyler

Eddie Foy Jr.
as Gabby Watters

James Stephenson
as Jim Cameron

John Litel
as Chief Agent Tom Saxby

Frank M. Thomas
as Doc

Bernard Nedell
as Earl 'Ace' Hemrich

John Ridgely
as Joe LeRoy

Anthony Averill
as Lead Henchman Hafer

Rosella Towne
as Zelma Warren