Life on Mars

Episode 7 (2x7)

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A water-tight court case fails to put away a local gangster. Unable to cope with a guilty man walking free, DCI Hunt turns to alcohol but soon finds himself in a spot of bother. When it appears as though Hunt may have killed someone, it's up to Sam, torn between Gene and his replacement, a DCI who actually uses Sam's modern police techniques and vocabulary, to help him out.