Mel Giedroyc: Unforgivable - Season 4

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.

With Rafe Spall, Dan Tiernan and Carol Vorderman. Rafe reveals how he managed to evacuate both his bowels and a swimming pool, Carol spills the beans on her bad behaviour at a wedding, and Dan confesses to some criminal misdeeds.

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

Mel and her dishonourable assistant Lou are joined by Daisy May Cooper, Emmanuel Sonubi and Ardal O'Hanlon. Emmanuel explains the rules of the game "flaming a***holes", Daisy tells us why you should never invite her to a wedding and Ardal reveals how dressing up as a priest ended up with him in a strangers' bath.

Mel and Lou are joined by The One Show presenter Alex Jones, voice of Love Island Iain Stirling and US comedian Tim Renkow. Alex reveals how she got into hot water with the BBC for lying, Iain spills the beans on being sacked, and Tim tells all about his mischievous method of evading train fares.

This week Mel and Lou are joined by TV personality Jamie Laing, comedian Fern Brady and musician Jordan Stephens. Amongst the misdeeds, Jamie reveals why he got arrested after a bungee jump, Fern lifts the lid on the terrible sex education she gave to her friends, and Jordan spills the beans on a long-running feud with a famous children's TV presenter.