Moment of Indiscretion

Janet Miller has been happily married to her barrister husband John for two years. Janet's former fiancé Brian contacts her, asking her to meet him at the flat of his friend Corby, who is absent. Though her intentions are mostly nostalgic and harmless, she keeps the meeting a secret from her husband to avoid unnecessary friction. Brian tells her he wanted to see her once more before departing for South America, probably forever.

After Brian has gone, Janet leaves the apartment and witnesses a man stab and murder a woman at the door of her lower-floor flat. The murderer escapes and Janet bends down to examine the body, dropping her handkerchief. Finding herself in a position compromised by not having told John she was meeting a former boyfriend, she decides to leave and not contact the police. However, she is seen by another tenant.

The police trace Janet through her handkerchief and question her in front of her husband. At first, she is evasive and unable to account for her movements. She eventually admits that she was at the building and witnessed the murder. However, she does not reveal the full details; the police become suspicious and arrest her for murder. John decides to investigate on his own by tracking down the real killer.

• Ronald Howard as John Miller
• Lana Morris as Janet Miller
• John Stone as Eric Stanton
• Denis Shaw as Inspector Marsh
• Piers Keelan as Detective Sergeant Field
• John Witty as Brian
• John Van Eyssen as Corby
• Ann Lynn as Pauline
• Totti Truman Taylor as Mrs. Cartier
• Robert Dorning as Mr. Evans
• Mark Singleton as the jeweller
• Judy Bruce as Vicki