An adventurer investigates the theft of a formula for hardened steel, assisted by his girlfriend.
Johnny O'Flynn
Doreen Wilson
Inspector Forsythe
Sylvia Newman
Dr. Crabtree
Prof. Newman
Dr. Metcalfe
Sgt. Cove
Beroni
Gilchrist
Patient in Doctor's Waiting Room
Chauffeur
'The Mae McCleod' Captain
Hotel Receptionist
Taxi Driver
