New Tricks: Season 3, Episode 3

3 - 3: Old Dogs

A dog is found killed in a manner that matches a series of animal murders from 30 years in the past. The team reopen the case, but the cruelty of the crimes affects Lane's judgement - especially when his own pet then dies. Halford's deteriorating health causes concern for his colleagues, and a visit to a museum leads to an alarming discovery.