Birds of a Feather (1989) : 2x4

The release of a fellow inmate plunges Darryl into depression. The anguish rubs off on Tracey, who decides that in an attempt to understand what Darryl is going through, she will live like a prisoner for the weekend. Sharon decides to join her and they set up the spare bedroom like a prison cell. When Dorien gets locked out of the house while Marcus is away, she stays at Tracey and Sharon's and acts like a prison officer. On Sunday, Dorien returns to her house to find that it has been burgled and forgets to unlock Tracey and Sharon. After a short while, they climb out of the window and throw roof tiles in an attempt to get Dorien's attention. However, when one tile ends up going through the car of a police officer investigating Dorien's burglary, they end up in a real prison cell. Meanwhile, Darryl's cell mate, Gary, cheers him up by trying to relive how Darryl spent his weekends before being sent to prison.