The Steel Key 1953

Synopsis:

An adventurer investigates the theft of a formula for hardened steel, assisted by his girlfriend.

Directed by: Robert S. Baker
Written by: John Gilling
Runtime: 69 minutes
Tagline: EXCITEMENT ALL THE WAY!
Cast:
Terence Morgan
Terence Morgan
Johnny O'Flynn 
Joan Rice
Joan Rice
Doreen Wilson 
Raymond Lovell
Raymond Lovell
Inspector Forsythe 
Dianne Foster
Dianne Foster
Sylvia Newman 
Colin Tapley
Colin Tapley
Dr. Crabtree 
Esmond Knight
Esmond Knight
Prof. Newman