Porridge - Season 1 Episode 6 -

After prisoner Warren gets a bad letter Fletch offers his welfare services to the other lads,instructing them on how to write a letter to their partners ensuring fidelity. Fletch's daughter Ingrid visits with bad news about Fletch's wife for which he gets a weekend's compassionate leave. There is no bad news - it is a ploy for Fletch to go home,spend time with his wife and watch football.