Death In Paradise: BBC One, 9pm
In tonight's series finale episode, Humphrey has a lot on his plate following the appearance of his ex-wife Sally, who claims she made a mistake in letting him go.
Humphrey and his team are also struggling to deal with a case initially believed to be suicide after an elderly woman is found dead.
However, as new evidence emerges that she may have been poisoned, the case turns into a locked-room murder mystery, setting the scene for a compelling final episode.
Hair: BBC Three, 9pm
In the second episode of this six-part series, the seven remaining hopefuls are put to the test once more as they attempt to make hats out of hair, cutting and styling a long layered cut and attempting to plait and braid hair into a stylish look.
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One more contestant will leave the show tonight, leaving the remaining six to fight it out next week with new challenges.
Dara Ó Briain: School Of Hard Sums: Dave, 10pm
Dara and maths professor Marcus du Sautoy return tonight for a third series of this mathematics-based comedy game show, as more conundrums are logically dissected.
Kevin Bridges and Peter Serafinowicz feature as guest starts.
Doll And Em: Sky Living, 9pm
In the third episode of this original comedy, Em's big scene is interrupted by Doll who has been cast as an extra, causing friction between the pair.
Things get even more complicated when Doll is injured in an accident.
