Debbie attempts to free Negatus from jail and comes face to face with some of Yonderland's most bizarre and lawless characters, the Sister Brothers. Peter's dad questions if Peter and Debbie's planned move to Glasgow is a good idea.

Cast: Mathew Baynton, Simon Farnaby, Anthony Head, Martha Howe-Douglas, Jim Howick, Anne Lafon-Delpit, Tom Meeten, Grace O'Leary, Laurence Rickard, Ben Willbond