John H. Watson

as Fitzroy

as Uniformed Policeman

as Ship's Officer (uncredited)

as Cpl. Bean

as Roberts

as Prison Warder (uncredited)

as Count Eger (1 episode)

as Plainclothes Det. Sgt.

as Police Sergeant

as Police Constable (uncredited)

as Tomkins

as Chauffeur

as Bert - Café Customer (uncredited)