DI Sleet is joined by Dragons' Den star Deborah Meaden as they head up to Lady Gaga's mansion to deal with a minor complaint.
DI Sleet is joined by Olympic gymnast Louis Smith. The detectives learn that pharmacist Lindsay Lohan has been spray-tanned to death. She is the latest victim in a spate of murders - it looks like the detectives have a serial killer on their hands.
David Mitchell, Micky Flanagan and Richard Ayoade are joined by panellists Jimmy Carr and Charlie Higson. The guest narrator is Homeland star David Harewood.
DI Sleet is joined by TV presenter Dermot O'Leary. Our detectives learn that Amanda Holden, the mayor's PA, has been murdered. Mayor Simon Cowell has been kidnapped and is being held to ransom.
Guest panellists for episode three are comedians Jason Manford and Romesh Ranganathan. Journalist and presenter Mariella Frostrup is the guest narrator.
This week, team captains Micky Flanagan and Richard Ayoade are joined by Robert Webb and Miles Jupp – with actor Charles Dance as guest narrator.
DI Sleet is joined by Radio One DJ Greg James. Our detectives learn that there has been a murder at the Successville Art Gallery - Reese Witherspoon (owner of Successville's chain of bars, the Witherspoons) has been killed.
Micky Flanagan and Richard Ayoade are joined by panellists Ed Byrne and Gabby Logan, while the guest narrator is Phil Daniels. Hosted by David Mitchell.
Debbie tells Elf that she's had enough and wants her life back. The only way to close the portal, though, is to complete one last quest.