Detective Sergeant Mallory investigated when prisoner Terry Duckworth escaped following his wedding to Lisa Horton. Terry's mother Vera had persuaded the prison officer escorting Terry to remove his handcuffs during the ceremony and saw the opportunity to escape while the photographs were being taken. Mallory questioned the vicar and the guests at St. Mary's Church. Back at home, he further quizzed Lisa, Vera and Jack, who all insisted they knew nothing of Terry's plan to escape.

Terry was eventually caught by the police on the roof of Bettabuy.