Nixon and Nadir manage to track down De Costa before she can come to harm at the hands of suspect taxi driver David Russo. However, Morrell has no choice but to release Russo on bail when DNA tests fail to prove that he was responsible for the murder. Meanwhile, a second employee at St. Hugh's is reported missing by her husband. A subsequent search of Russo's garden uncovers a pile of equipment used for building incendiary devices – but not all of the devices have been located. Nixon does a deal with Peter Baxter, agreeing to speak to one of his former victims in return for information on local consecrated buildings where the second missing victim could be being held. (thetvdb.com)