First broadcast 10th April 2011.
During an ecumenical conference in formerly Catholic St. Gerard's college, the poisoning of a female black American bishop triggers a series of bizarre murders.
Ronald Pickup - Fr Moreno Mancini
Siân Phillips - Adele Goffe
Pamela Nomvete - Helen Parsons
Christopher Timothy - Barry Winter
Daniel Ryan - Felix Sansome
Kevin Whately - DI Robert Lewis
Laurence Fox - DS James Hathaway
Amelia Bullmore - Caroline Hope
Sorcha Cusack - Prof Joanna Pinnock
Amanda Ryan - Gina Goffe
Paul Anderson - Alastair Darlow
Nicholas Sidi - Stephen Blackmore (as Nick Sidi)
Rebecca Front - Chief Superintendent Jean Innocent
Clare Holman - Dr. Laura Hobson
Aisling Bea - Hotel Receptionist
Scott Arthur - Constable
Amber Aga - DC Karen Middleton (as Amber Agar)
Graham Curry - City Council Worker
Ruth Rickman - Wedding Guest
Gilbert White - Scene of Crime Officer
