Chloe Hadjimatheou, who broke the story about the bestselling memoir, continues her investigation. Plus: a silly thriller romp with a fun cast. Here’s what to watch this evening

9pm, Sky Documentaries
It was the literary scandal of the year: the Observer alleged that the author of the bestselling memoir The Salt Path, Raynor Winn, hadn’t been entirely truthful in telling the tale – which was made into a film – of financial ruin, her husband, Moth’s, terminal illness and natural healing. Since then, more people have come forward with their version of events. Reporter Chloe Hadjimatheou continues to piece together the exposé that shocked and saddened a nation. Hollie Richardson

The Clueless icon plays an aggressive lawyer in sinister series Irish Blood. Plus: Ant and Dec’s ridiculous new challenge show. Here’s what to watch this evening

9pm, Sky Witness

From Judi Dench’s very naughty tea with Kenneth Branagh to the Peep Show Bake Off special – including Olivia Colman! – here’s your definitive guide to the best holiday viewing. Bring it on

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Amber, George, Balvinder and Karen battle it out for a chance at the glitterball trophy. Plus: get in the spirit with some festive bangers. Here’s what to watch this evening

6.35pm, BBC One