There's The Trial of Richard Satchwell, the Tonight Show: Presidential Debate, Lucy Letby: Murder or Mistake, this month’s CrimeCall, as well as the return of Belfast-based cop show Blue Lghts . . .
Pick of the Day
The Trial of Richard Satchwell, 9.00pm, Virgin Media One
This is an investigation into the disappearance and murder of 44-year-old Cork woman Tina Satchwell (below).
With exclusive interviews from her family, the documentary follows the case from Tina's sudden disappearance in March 2017, through the cold-case breakthrough six years later, to the dramatic trial that finally brought her husband, Richard Satchwell, to justice.
Featuring exclusive interviews with Tina’s family and drawing on Richard Satchwell’s many media appearances, the documentary examines the key evidence that secured a conviction and reveals how, in trying to shape the narrative, it was his own words that helped seal his fate.
New or Returning Shows
Blue Lights, 9.00pm, BBC One
Here's season 3 of the hit drama following three new recruits to Belfast's police force, starring Sian Brooke and Martin McCann.
The arrest of young drug dealer Sandy McKnight begins to expose a criminal conspiracy involving every level of Belfast's society, from wealthy businesswoman Dana Morgan to vulnerable teenager Lindsay Singleton.
Lucy Letby: Murder or Mistake, 8.00pm, Channel 4
Oddly enough, there’s no question mark at the end of this programme’s title. I wonder why?
This two-part documentary covers the infamous murder case, following the turbulent months after the conviction and a high-profile campaign to sway public opinion.
For the first time, one affected family break their silence about their experience with Letby and their newborn. As tensions rise, families accuse Letby's defence of turning tragedy into spectacle.
Part two follows at 10.05pm.
Stitched Up? Surgery in the Sun, 10.40pm, BBC One
Cosmetic surgery abroad promises transformation at a bargain, but behind the filters and hashtags, the risks are all too real.
Journalist Aoife Moore gets under the skin of the multi-billion medical tourism industry.
She begins by talking to her cousin Sean, who travelled to Turkey four years ago for gastric sleeve surgery.
In Lurgan, County Armagh, Aoife meets online influencer Chloe, who is about to head to Istanbul to have a boob job.
Tonight Show: Presidential Debate, 10.00pm, Virgin Media One
The Tonight Show debate, which will be the first of the campaign, will be hosted by Kieran Cuddihy (below).
This time around ther are just three candidates: Catherine Connolly (independent), Jim Gavin (Fianna Fail) and Heather Humphries (Fine Gael).
The Tonight Show will broadcast as normal each Tuesday and Wednesday night during the campaign.
Nightsleeper, 10.30pm, RTÉ2
Real-time thriller, starring Joe Cole, Alexandra Roach, David Threlfall and Sharon Small, that was recently on the BBC.
A train is taken over by cyber terrorists on a night-time journey from Glasgow to London, leaving an off-duty cop on board to team up with the acting technical director at the National Cyber Security Centre in a bid to beat the bad guys.
But with no idea of who they are fighting and a few other passengers who may not be as innocent as they look, it seems they are in for a long night.
CrimeCall, 9.35pm, RTÉ One
Streaming on RTÉ Player
Carla O'Brien (below) presents the monthly appeal for help from the public in solving crimes, featuring reconstructions, CCTV footage, news features and a panel of police advisers taking calls.
Secrets of the Brain, 9.00pm, BBC Two
Theoretical physicist Jim Al-Khalili goes on a journey through 600 million years of evolution to uncover how the human brain, the most complex structure known in the universe, came to exist.
With some 100 billion neurons and more than 100 trillion connections, the human brain is one of nature's greatest achievements.
But how did something so incredibly sophisticated evolve from the simplest beginnings?
Don’t Miss
The Orson Welles Story: Arena - Part One, 10.00pm, BBC Four
This is a superb profile of the director, actor and writer Orson Welles (below), including an interview in which he reflects on his long career in the film industry from the success of Citizen Kane up to his work on Touch of Evil.
Featuring contributions by Jeanne Moreau, John Huston, Peter Bogdanovich, Robert Wise and Charlton Heston
The much shorter (55 mins) part two follows at 11.50pm.
Here, Welles discusses more of his films, including The Trial, Chimes at Midnight, The Immortal Story and F for Fake.
He also talks about his unfinished projects - The Other Side of the Wind and Don Quixote.
Alan Yentob's interview with Welles is interspersed with the thoughts of other cinematic luminaries, including John Huston, Jeanne Moreau, Peter Bogdanovich and Anthony Perkins.
Snowpiercer, 9.30pm, TG4
Bong Joon-ho's fantasy thriller, starring Chris Evans, Song Kang-ho, Tilda Swinton, Jamie Bell and Octavia Spencer, is a cracking movie.
In a snow-ravaged world, a group of travellers fight for survival on a train that perpetually circumnavigates the globe.
The vehicle's occupants are divided into a military ruling elite and their dishevelled captives.
But now, 17 years after the train set out on its seemingly never-ending journey, the downtrodden, abused captives have had enough. Revolution is afoot.
