Актьори

• David Tennant — Dennis Nilsen
• Daniel Mays — Peter Jay
• Jason Watkins — Brian Masters
• Ron Cook — DSI Geoff Chambers
• Barry Ward — DI Steve McCusker
• Faye McKeever — Linda Jay
• Jay Simpson — DS Chris Healey
• Jamie Parker — Allan Green QC
• Pip Torrens — Ivan Lawrence QC
• Ross Anderson — Douglas Stewart
• Andrew Woodall — Professor Hardy
• Ben Bailey Smith — DC Brian Lodge
• Bronagh Waugh — Charlotte Proctor
• Chanel Cresswell — Lesley Mead