Inspector Blomfield catches a thief who has a fatal accident while trying to escape in his car. A short time later, his drug-addicted brother Johnny enters the police station while Blomfield is investigating a murder and threatens to blow himself and everyone else up with a bottle of nitroglycerine.
as Eddie Blomfield
as Johnny Smith
as Sergeant Harry Colman
as Susan Gillespie
as Inspector Sterling
as Colonel Lister
as Mac O'Hara
as Blinky Smith
as Fred Lancaster
as Arthur Baker
as Nelly Blomfield
as Shakespeare
as Mary
