Super-Sleuth

Bill Martin

Mary Strand

Professor Herman

Larry Frank, a movie stand-in

Police Lt. Garrison

Doris Duane, a film actress

Ralph Waring

Gibbons, a film director

Warts, Martin's manservant

Beckett

Eddie - Doorman

Motorcycle Cop

Policeman

Script Girl

Hair Dresser

Cameraman

Jailer

Casey

Sullivan

Grimes

Child movie fan

Photographer

Man whose beard catches fire

Mrs. Abbington