It's wedding season in Bath, but a string of suspicious deaths is affecting celebrations across the city. Is there a serial killer on the loose who goes after weddings? In a series of cryptic calls to the local radio station, an anonymous person threatens that there is a plan for more murders. It's a case that pushes McDonald and Dodds to the limit.

• Robert Murphy

• Tala Gouveia
• Rosalie Craig
• Jason Watkins