Bernie and Norman stay over at a pub overnight after their fruitless interview with Colonel Edgerton, little realizing that they are under surveillance from various people eager to find out what they know about the diamonds. Someone who does is Foxwell, Edgerton's batman, who is eager to prevent them finding out more. Bernie and Norman track down Jack Carter's former army sergeant George Billyard, now a Navy commander in Brighton, to see if he knows more. Meanwhile, Helen may have a lead of her own with a old photograph, but little realizes her life may be in danger.