Heartbeat (1992)

Season 11: Episode 5

When a series of items go missing at a nursing home, the police investigate. After Oscar Blaketon discovers her qualifications are false, suspicion is on the owner, Mrs. Hargreaves. It turns out it was actually one of the residents, who was a little absent minded. David becomes involved in house clearing, but after a not very securley attached 6 turns into a 9, David clears the wrong house!