Episode: And What Shall We Do for a Ring? Due to yet another of the coincidences that Tom always attracts he ends up with the spoils from a supermarket robbery and a jewel heist due to an identical suitcase and an identical car to the robbers - not to mention a stash of live ammunition. Whilst he and Alison revel in their unaccountable good fortune Special Branch visit and the pair celebrate their engagement dinner in a police cell - though Tom does finally produce a ring for his betrothed. A further misunderstanding means that Alison's parents are also arrested.