Bad Boy (2)

Following the disastrous raid Helen is suspended but she tells Banks that her colleague Trethowan reentered the house after the event, leading them both to surmise, correctly, that he was covering up for his girlfriend, the policewoman who Tasered Peter Doyle and Helen is exonerated. Meanwhile Kitson takes Tracy to Jenkins' house, where he intends to hold her as a hostage in return for the gun. However Jenkins ultimately admits to Banks that he is terminally ill and the reappearance of his long-lost illegitimate son, by whom he wanted to do right before dying, angered Kitson to the point of murder . Tracy is ultimately returned to her father.

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S04E01 - What Will Survive (1)