Will Hay

Captain Ben Cutlet

Moore Marriott

Harbottle

Norma Varden

Olivia Potter-Porter

Kenneth Warrington

Yates

Dennis Wyndham

Maryatt

Amy Veness

Emma Harbottle

Graham Moffatt

Albert

Peter Gawthorne

Bit Role (uncredited)

George Merritt

Officer on Yacht

Charles Rolfe

Second Detective

Leonard Sharp

Crew Member

Harry Terry

Crew Member

Percy Walsh

Captain of the 'Rob Roy'

William Beaudine