Porridge

S1, E2: The classic prison sitcom returns nearly 40 years after Norman Stanley Fletcher served his time. The legendary series creators Dick Clement and Ian La Frenais write the one-off special episode, which sees Fletch's grandson, also known as Fletch, imprisoned for a series of cyber-crimes. Fletch finds himself beholden to prison bad boy Richie Weeks and forced to use his hacking skills to get Weeks off the hook. The problem being that wily prison officer Meekie has got his beady eye on Fletch - he knows a wrong 'un when he sees one.