Will Hay
— Captain Ben Cutlet
Moore Marriott
— Jeremiah Harbottle
Graham Moffatt
— Albert
Norma Varden
— Olivia Potter-Porter
Kenneth Warrington
— Yates
Dennis Wyndham
— Maryatt
Amy Veness
— Emma Harbottle
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'