Below are my picks of the most notable TV shows debuting/returning to UK screens this week...
Shop Secrets (Channel 4, 8.30pm) New series where shops are equipped with hidden cameras and scams undertaken to reveal various tricks. (1/8)
The Plantagenets (BBC2, 9pm) New history series looking at England's longest-ruling royal family. Presented by Professor Robert Bartlett. (1/3)
★ The Widower (ITV, 9pm) New factual drama based on the story of convicted murderer Malcolm Webster, who drugged his wife before eventually killing her. Starring Reece Shearsmith & Sheridan Smith. (1/3)
Life & Death Row (BBC3, 9pm) Documentary on capital punishment, seen through the eyes of people on Death Row. (1/3)
Prostitution: What's the Harm? (BBC3, 10pm) Documentary about young people's attitude to prostitution.
Undercover Doctor: Cure Me, I'm Gay (Channel 4, 10pm) Special where Dr Christian Jessen undergoes so-called cures for his homosexuality.
★ W1A (BBC2, 10pm) New mockumentary comedy sequel reuniting many of the characters from Twenty Twelve. Starring Hugh Bonneville, Jessica Hynes, Jason Watkins, Monica Dolan, Hugh Skinner, Nina Sosanya, Sarah Parish & David Westhead. (1/4)
On Assignment (ITV, 10.35pm) New monthly current affairs programme. Presented by Rageh Omaar. (1/8)
Ade at Sea (ITV, 8.30pm) New series where Adrian Edmondson sails around the UK and investigates the country's maritime history. (1/6)
★ Davina: Beyond Breaking Point for Sport Relief (BBC1, 9pm) Coverage of the presenter's gruelling physical challenge to raise money for charity.
Dangerous Dogs (ITV, 9pm) Two-part factual series on the rise of dog attacks in the UK. (1/2)
Inside Rolls-Royce (Channel 4, 9pm) Behind-the-scenes documentary on the famous, luxurious British car brand.
8 Out of 10 Cats Does Countdown (Channel 4, 10pm) Series 3 of the panel show mash-up. (1/4)
A Very British Renaissance (BBC2, 9pm) New history series looking at the period when the UK embraced culture in the mid-17th-century. Presented by James Fox. (1/3)