SHETLAND 9PM, bbc1

There’s a body in a suitcase at the bottom of the sea, but it isn’t the missing lad Connor, much to the relief of his desperate parents. Connor’s father Danny takes matters into his own hands, fleeing to Ayr and using his ex-cop instincts to follow his own angle, doing much of the groundwork for Perez, who catches up with him just as Danny makes a shocking discovery. Back on Shetland, another body turns up.