Mel Giedroyc: Unforgivable Episode Rating Graph

This week Mel and her dishonourable assistant Lou Sanders are joined by Nish Kumar, Ruby Wax and Reuben Kaye. Nish spills the beans on his x-rated workplace behaviour, Ruby tells of her drug smuggling past and Reuben's NSFW pantomime pranks are revealed.

In the first episode, Mel and her dishonourable assistant Lou Sanders are joined by Rylan Clark, Lucy Beaumont and Fatiha El-Ghorri. Lucy admits she nicked knickers in school, Fatiha reveals her secret cooking ingredient is sheep poo, and Rylan spills the beans on how he combined a pigeon meeting a sticky end and getting revenge on a colleague.

Mel and Lou are joined by Lethal Bizzle, Kerry Godliman and Tom Lucy.

Mel and Lou are joined by actor Sally Phillips, comedian Alan Davies and stand-up Ria Lina. Sally reveals the best way to get back at a horrible boss, Alan tells all about his court appearance and we find out why you should never leave your kids with Ria.

This week Mel and her dishonourable assistant Lou Sanders are joined by Charlotte Church, Sophie Willan and Lara Ricote. Charlotte spills the beans on her wild child past, Sophie dishes out some karma and Lara reveals how she pulled off a cheese-based heist.

Jennifer Saunders spills the beans on a sinister childhood prank, Harry Redknapp tells all about the time his love of jellied eels got him in hot water and Phil Wang reveals the time he left a surprise for some builders.

Mel and Lou are joined by Thaniya Moore, Joel Dommett and Craig Revel Horwood.

Mel and Lou are joined by stand-up and Strictly champion Bill Bailey, award-winning comedian Rosie Jones and former heavyweight champion of the world David Haye. Bill comes face to face with multiple victims of his and his dog's bad behaviour, David overshares about creative ways to take his training supplements and Rosie confesses all the times she's used her disability for evil.

Mel and Lou are joined by the hilarious Rob Beckett, Scarlett Moffatt, and Paul Chowdhry. Rob dishes the dirt about a date that went wrong, Scarlett reveals what happens when you take her on a girls holiday and Paul tells us why gigging isn't always a laugh.

Mel and Lou are joined by radio DJ Sara Cox, TV favourite Keith Lemon and Britain's Got Talent's Nabil Abdulrashid. Sara faces the consequences of her less than model behaviour, Keith overshares about puberty and Nabil is confronted by the many victims of his pranks.

Johnny Vegas overshares about what he used to get up to in the bath, Josh Widdicombe tells all about the time he ruined hundreds of Beckham fans day, and Clare Balding admits blaming her brother for a bowel movement in the bath 40 years ago.

David Baddiel spills the beans on an inside joke that went awry, Sophie Duker confesses to catfishing and Rob Rinder divulges the truly awful way he got revenge in a case of unrequited love.

Jimmy Carr reveals an act of erotic vandalism committed at school, Judi Love tells all about the horrific demise of her beloved pet goldfish and Richard Bacon tells a truly Unforgivable tale about rugby tackling a disabled boy.

Graham Norton reveals a lie to his mother that went too far leading to him having to have his appendix removed, Alex Brooker talks about 'trying to catch a girl' in a Home Alone inspired trap and Desiree Burch admits to cheating with a friend's boyfriend at high school.