Herbert Rawlinson

Sanford Quest

Ann Little

Lenora MacDougal (as Anna Little)

William Worthington

Prof. Ashleigh / Lord Ashleigh / Lady Ashleigh

Frank Lloyd

Ian MacDougal

Mark Fenton

Inspector French

Laura Oakley

Laura - Quest's Assistant

Frank MacQuarrie

John Craig

Joe Martin

Chimp

Otis Turner

Director