Unforgotten

Monday, ITV, 9pm

Goodness gracious racious me, look who’s back. ack. Yes, it’s the return of Sanjeev Bhaskar as DI Sunny Khan alongside Nicola Walker’s DCI I Cassie Stuart rt (above) in the he expertly crafted police drama that has given the cold-case format a new lease of, er, life. This fourth series begins its six-part run with the discovery of the dismembered body of a man who has been missing for more than 30 years, identified with the aid of a Millwall FC tattoo. But his body has been moved much more recently than that. A troubling investigation delves into some dark chapters of this country’s recent history, and a fine ensemble cast includes Sheila Hancock, Susan Lynch and Andy Nyman.