Sanford Quest

Herbert Rawlinson

Lenora MacDougal (as Anna Little)

Ann Little

Prof. Ashleigh / Lord Ashleigh / Lady Ashleigh

William Worthington

Ian MacDougal

Frank Lloyd

Inspector French

Mark Fenton

Laura - Quest's Assistant

Laura Oakley

John Craig

Frank MacQuarrie

Chimp

Joe Martin

Director

Otis Turner