Bruce Seton

as Mark

as Prof. Flaherty

as Beadle

as Wilson (uncredited)

as Lt. H. Pennell R.N.

as Tallow

as Sergeant Odd

as PC 'Jock' Campbell

as Patrolman (uncredited)

as Prosecutor

as Policeman on Train (uncredited)

as Detective Chief Inspector

as (uncredited)

as Supt. Crowe

as Assistant Commissioner

as Webb

as Ronald Bruce

as Sgt. Bellamy

as 1st Villager

as Journalist (uncredited)

as Landlord

as Col. James Somerset

as Madison, tall henchman

as Jack Wraydon

as Don Chinko

as Supt. James

as Dancer

as Ted Austin

as Inspector Davis

as Sergeant

as Bill Dodd

as Mac

as Charlie

as Prof. Flaherty (archive footage)

Cast

as Lord Steven Wolverbury

as Bill Bryant

as Lt. Travers

as Johns

as River Police Inspector

as John Smith

as Gerald Vane

as Lord 'Tiny' Tyneside

as Inspector Shearing

as Sellars

Cast

as Inspector Fabian

as Felix

as Jamie Turner

as Roger Manning

as Captain Randall

as Squadron Leader Briarly

as James Pelly

as Major Osborne

as Harry Stone

as Donald Carson

as Johnnie Miller

as Nimmo