Joan Marsh
— Donna Wells
John Archer
— Prof. J. Thomas Quincy
Warren Hymer
— Gabby Walsh
Milburn Stone
— Johnny Reilly
Pat Gleason
— Louie Pozowicz
Tristram Coffin
— Slater
Ann Evers
— Milly
Charles Judels
— Duke Talbot
Gene O'Donnell
— Monk
Ben Taggart
— Chief Detective W. A. Barlow
Charlie Hall
— Rabbit
Fern Emmett
— Mrs. Bowse
Irving Mitchell
— Bob 'Pops' Wilson
Billy Griffith
— Professor Dinwiddle