Drive on By (Part One) The Bill : Season 20 Episode 20

Klein investigates when Brendan Bailey, a man who murdered a young girl fourteen years previously, is attacked and robbed on the way home from the pub, and is unable to remember anything prior to the incident. Klein suspects that the attacker may be the father of another young girl who disappeared without trace just months after the first murder. When the man is exonerated, he takes it upon himself to track down Bailey and hold him at gunpoint until he reveals the location of his missing daughter's body. Klein manages to defuse the situation, but when Bailey follows him to Jamaica Wharf, Bailey is shot twice at close range, with Klein being the only witness willing to identify the mysterious gunman.