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.

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.

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.

Tom Allen tells all about the time he was responsible for an old lady ending up in a pond, Gemma Collins reveals the crime she committed to catch a ex cheating and Darren Harriott relives his short-lived gang days.

Richard Ayoade admits he doesn't help others... ever, Ed Gamble tells a tale about a lads holiday, and Sindhu Vee reveals how protective she can be of playground swings. We also hear about Richard's football antics, how Sindhu can't go to the cinema on her own, and Ed's eventful last day of school.

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.

Sara Pascoe reveals a truly terrible lie she told about having leukaemia to get out of work experience, Kammy tells how he burnt his parents' house down and Jo Brand divulges how she was responsible for putting a guy she hooked up with on holiday in prison.

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.

Mel and her dishonourable assistant Lou Sanders are joined by brilliant stand-ups Sarah Millican, Jamali Maddix and Chris McCausland. Sarah discusses what ingredient she thinks should be added to cakes in Amsterdam, Chris has to apologise to one of the victims of his prank-fuelled past while Jamali and Mel find out they have similar tactics when being caught short without a loo.

Mel and Lou are joined by the brilliant Katherine Ryan, Drag Race standout star Bimini Bon Boulash, and stand-up Toussaint Douglass. Katherine spills the beans on her prom night, Bimini reveals what happens after too many vodkas and Toussaint explains why you should never accept chicken from strangers.

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 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.

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.

Mel and Lou are joined by the brilliant Jack Dee, TV sweetheart Lorraine Kelly, and internet sensation Munya Chawawa. Jack tells all about an unintentional rock and roll night on tour, we find out how Lorraine talks to her bosses and Munya is confronted by the victim of a prank that went too far.

Mel and Lou are joined by comedian Jason Manford, Strictly star AJ Odudu and actor Jessica Knappett. Jason reveals the lengths he'd go to not share a room with his brother, AJ reveals the secret to DJing, and Jessica explains why you should never attend a funeral with her.

Mel and Lou are joined by Rhod Gilbert, Susan Wokoma and Dermot O'Leary. Rhod reveals why he shouldn't be trusted with a campervan, Susan tells an X-rated story and Dermot lifts the lid on a rendezvous from his early TV days.

Mel and Lou are joined by Thaniya Moore, Joel Dommett and Craig Revel Horwood. Joel Dommett lifts the lid on a shocking act with a kettle, Craig Revel Horwood reveals how he ruined a bride's big day, and Thanyia Moore bares all on getting revenge on a teacher.

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.

This week Mel and her dishonourable assistant Lou Sanders are joined by Guz Khan, Roisin Conaty and Gregg Wallace. Guz explains why he urinated in a VCR player, Roisin reveals how she tried to trick the police and Gregg reveals his thieving past.

Mel and Lou are joined by Ellie Taylor, Josh Pugh and Stephen Mangan.

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

Mel and Lou are joined by Seann Walsh, Meera Syal and Maisie Adam. Meera Syal gets revenge with a dirty nappy, Seann Walsh reveals how he evaded the police, and Maisie Adam spills the beans on an illicit encounter.

Mel and Lou are joined by Olga Koch, Jonathan Ross and Slim. Jonathan spills the beans on a disastrous visit to a strip club and Olga tells of her catfishing past.

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 Joel Dommett, Omid Djalili and Lindsey Santoro. Joel confesses his dastardly behaviour as his wife gave birth and Omid reveals how he upset Gwyneth Paltrow.

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.

Mel and Lou are joined by Rafe Spall, Carol Vorderman and Dan Tiernan as Rafe lifts the lid on how he evacuated a swimming pool and Carol reveals how she ruined a wedding.

Mel and Lou are joined by Ross Kemp, Shirley Ballas and Rosie Jones as Shirley divulges her revenge on a cheating husband and Ross spills all on a prison-based prank.

Mel and Lou Sanders are joined by Daisy May Cooper, Ardal O'Hanlon and Emmanuel Sonubi as Emmanuel explains why his towels are sticky and Daisy gets Matchmaker creative.

Mel and Lou are joined by Alex Jones, Iain Stirling and Tim Renkow as Alex reveals how she got into trouble with the BBC and Iain spills the beans on being sacked.

Mel and Lou Sanders are joined by Jamie Laing, Fern Brady and Jordan Stephens as Jamie and Jordan reveal all about their run-ins with the police.