Leo Gorcey
— Terence Aloysius 'Slip' Mahoney
Huntz Hall
— Sach
Douglass Dumbrille
— Dr. Coslow
Bobby Jordan
— Bobby
Gabriel Dell
— Gabe 'Gabie' Moreno
William Benedict
— Whitey (as Billy Benedict)
David Gorcey
— Chuck
Tanis Chandler
— Mignon
Maurice Cass
— Dr. Bender
Vera Lewis
— Mrs. Grimm
Charles Middleton
— Mr. Stiles
Chester Clute
— Brown
Richard Alexander
— Ivan
Bernard Gorcey
— Louis Xavier 'Louie' Dumbrowski
Charles Millsfield
— Dean Pettyboff
Art Miles
— Herman the Gorilla (as Arthur Miles)