Now installed in London as a Professor at the university, Sam Ryan is called to assist when a helicopter carrying 16 men crashes in the North Sea en route to a drilling platform. The pilot's body is recovered and the autopsy reveals he suffered a heart attack between the time he sent a distress signal and the time the helicopter crash. He had recently postponed his annual medical check-up but Sam suspects there is more to this than meets the eye. In completing the autopsies on the recovered bodies, it seems that the aircraft may have suffered a catastrophic failure. Written by garykmcd

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Brian McNally is a one-time criminal with a major problem. The day after he is badly beaten by gangster Mike Georghiou, McNally finds Georghiou's strangled body at his business. He's convinced that Mike's brother Tony, also a gangster known for his violent streak, will come after him so he gets Sam Ryan to prove that he couldn't have been the killer. Sam does so but when McNally's body is found at the foot of a building, a supposed suicide, she feels she has somehow contributed to his death. What Sam doesn't realize is the is not only going up against organized crime but coppers who've acted as judge, jury and executioner. Written by garykmcd

Following the death of murder suspect Brian McNally, Sam Ryan is approached by his daughter.

Sam Ryan is reunited with newly promoted DCI Michael Connor when they investigate a fire in a cinema. Sam manages to identify all but one of the 12 victims, body #10. As she gathers more information, including the use of a facial reconstruction, she comes to believe that body #10 is in fact someone who was supposed to have been killed years before and for which Chris Caldwell was convicted of murder. Sam becomes quite attracted to him and manages to get him set free, but when others are subsequently murdered, Connor doesn't believe Caldwell is quite as innocent as Sam believes. Written by garykmcd

Having learned that violent criminal Chris Caldwell may have been wrongly convicted for murder, Sam and DCI Michael Connor are eager to get at the truth.