Wallander BBC1, 9pm
This is the last-ever episode of the crime drama, and as usual, it’s as gripping as ever. This time, Kurt’s case is a personal one involving the search for his daughter Linda’s father-in-law, Hakon Von Enke. The only clue to his whereabouts is an incident aboard a submarine a quarter of a century ago. But it’s a matter of taking one step forward and two back when a devastating event threatens everything, and Kurt finds himself up to his neck in the shady world of Cold War-era politics – something he must get to grips with quickly if he’s to protect Linda.