- Neil Dudgeon (DCI John Barnaby)
- Nick Hendrix (DS Jamie Winter)
- Fiona Dolman (Sarah Barnaby)
- Annette Badland (Fleur Perkins)
Episode: The Oblong Murders
Air Date: 2011-05-25
Runtime: 90 min
Bullard asks Barnaby to investigate the disappearance of a friend's daughter who was a member of the Oblong Foundation, a cult based at Malham Hall. Jones goes undercover as a new recruit to solve the mystery, but he and Barnaby soon start digging into an old case involving the death of a couple in a boat explosion, which could be linked to the missing woman. With Will Knightley, Kevin Doyle, Holly Aird, Barbara Flynn and John Woodvine