This week's top TV includes a documentary exploring how the moon shapes life on Earth, the return of Death Row with broadcast legend Trevor McDonald and everything is not as it seems in new BBC drama, Requiem.
The team will spend four nights at the Natural Trust's Sherborne Park Estate in the Cotswolds, to find out how animals they observed last autumn are doing. Chris Packham and Michaela Strachan host and Martin Hughes-Games ventures further into some of the hidden stories around the estate.
Documentary: Britain's Favourite Walks: Top 100
From Scotland's breathtaking West Highland Way to the ancient Ridgeway extending from Wiltshire to the Thames, this marathon countdown is the result of the largest survey ever conducted into our hiking habits. Famous faces, including Catherine Tyldesley, Larry Lamb and more discuss their own personal favourites alongside expert ramblers, nature lovers and walkers.
Health: The Truth about Getting Fit
8pm, BBC One
Michael Mosley and a team of scientists look for some of the easiest and most effective ways to get the biggest benefits from exercise. Michael installs a bike in an office to test whether workers can get fit by doing just two minutes of intense exercise a week. He also joins strength experts in Glasgow to conduct a six-week experiment into building muscle.
Documentary: Wonders of the Moon
9pm, BBC One
From Wales to Wyoming, and from Hong Kong to Croydon, this programme explores how the Moon shapes life on Earth. After a remarkable year of lunar activity, which included America's first total solar eclipse for nearly a century, we find out why so many supermoons have been lighting up the night sky.
Documentary: Death Row 2018 with Trevor McDonald
Five years after spending two harrowing weeks on Indiana State Prison's death row, Trevor McDonald returns to find that the prison has built a new death chamber. He meets the latest arrival, William Gibson, a serial killer, convicted of killing and mutilating three women, who gloats that there might be more victims.
9pm, BBC One
Talented cellist Matilda Gray's world is turned upside down when her mother commits suicide. She later finds a box of items on her mother's bed relating to a young girl, who went missing from a Welsh village 23 years earlier, so along with her friend Hal she travels to Penllynith to see whether her mother's death could be related.
The newly promoted Detective Sergeant Morse investigates when a famous international thief tries to steal a Fabergé egg from an auction. The case leads to the gruesome murders of an academic and a gangster, and Morse is convinced the deaths are the work of the same man.
Entertainment: SAS: Who Dares Wins
9pm, Channel 4
Only 7 from 25 recruits have made it this far. The remaining bunch will face the most grueling test of their physical and mental resilience so far, with the instructors pitting them against each other until only one remains.