Super-Sleuth

Jack Oakie

Bill Martin

Ann Sothern

Mary Strand

Eduardo Ciannelli

Professor Herman

Alan Bruce

Larry Frank, a movie stand-in

Edgar Kennedy

Police Lt. Garrison

Joan Woodbury

Doris Duane, a film actress

Bradley Page

Ralph Waring

Paul Guilfoyle

Gibbons, a film director

Willie Best

Warts, Martin's manservant

William Corson

Beckett