Insomnia's soundtrack does heavy lifting in limp spine-chiller

If, like me, you have the subtitles on while watching TV, you'll have noticed the music in spooky chiller Insomnia (Channel 5, Sun-Tues, 9pm) doing a lot of heavy lifting.

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As Vicky McClure sleepwalks around her immaculately Farrow-and-Balled home, the subtitles try to tell us that the music is “tense”, “suspenseful”, “eerie” and, best of all, “creepy and pulsating”.

Largely though, the soundtrack is guilty of overselling the drama, as many sequences simply involve McClure's troubled hotshot lawyer and mum-of-two walking about - whether through porcelain-tiled offices, art deco hospitals or, in some cases, shin-deep in a lake.

McClure is Emma, desperately trying to overcome a chaotic childhood to become a success both in her career, and in her family life.

Being a hotshot lawyer, Emma's husband Robert (The Gold's Tom Cullen) is a stay-at-home dad and part-time artisan carpenter, looking after winsome moppet Will and narky teenager Chloe.

Unfortunately, her impending 40th birthday is sending Emma - and her family, it seems - into a tailspin, possibly connected to her mother's mental breakdown just before she turned 40.