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.

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.