Kate Winslet stars in one-off Channel 4 drama I Am Ruth, Mark Kermode's Secrets of Cinema returns, there's Christmas at Blenheim Palace, and the final episode of Hector Balkans go Baltics . . .
Pick of the Day
I Am Ruth, 9.00pm, Channel 4
Being a teenager in today's world has to be extremely tough as peer pressure and the opportunity to bully has mushroomed thanks to technology.
Dominic Savage and Kate Winslet's one-off drama is a contemporary story touching on the endemic mental health crisis affecting young people.
Winslet co-stars as Ruth, a loving and concerned mother who witnesses her teenage daughter Freya retreating into herself as she becomes more and more consumed by the pressures of social media.
Mia Threapleton – Winslet's real-life daughter – plays Freya.
Don’t Miss
The Secret Genius of Modern Life, 8.00pm, BBC Two
With around a third of the UK population now owning fitness trackers, they've become a nation obsessed with tracking their every move.
Presumably, it’s a pretty similar story over here.
Hannah Fry (above) finds out how car crashes from back in the 1970s have helped today’s fitness-seeking people to count their steps without having to use their fingers and toes.
She also learns why high-altitude Second World War dog-fights led to a crucial health monitor, and how fitness trackers are even being used to catch killers.
American Sniper, 9.35pm, RTÉ2
Pretty good biopic based on the experiences of real-life Iraq conflict veteran Chris Kyle, directed by Clint Eastwood and starring Bradley Cooper, Sienna Miller and Kyle Gallner.
A bulked-up Cooper plays a Navy Seal who becomes a legend to his colleagues thanks to his skills as a deadly sniper.
On his return to the US following four tours of duty in Iraq, he finds living an ordinary life as a husband and father far more difficult to deal with than the demands of warfare.
MasterChef: The Professionals, 8.00pm, BBC One
It’s squeaky plate time as the four remaining contenders battle it out for a place in the Final.
Firstly, they are asked to create a dish inspired by a place close to their heart.
Imagination, technical excellence and delightful flavours are the order of the day as they endeavour to get judges Anna Haugh, Marcus Wareing and Gregg Wallace (above) to buy-in to their sentiments through the taste of their food.
Next, the chefs face a new and formidable challenge when they are asked to cook a show-stopping dish of their own creation for top food critics Jay Rayner, William Sitwell, Leyla Kazim, Jimi Famurewa and April Jackson.
Then, the final four become the final three.
The Traitors, 9.00pm, BBC One
As this week’s trio of episodes conclude, the stakes are getting higher and the Faithfuls feel like they are on the backfoot.
It remains to be seen therefore whether they can change the course of the reality game, and put the traitors under fire.
With life-changing money still at stake, the players must also remain focused on building the prize pot in a mission that sees them go to new depths of despair.
However, that's the least of their worries, with an explosive Round Table on the horizon.
New or Returning Shows
Ceol na nGael, 10.15pm, RTÉ One
To mark 50 years of Raidió na Gaeltachta, musician and national treasure Mairéad Ní Mhaoinigh explores the role the station has played in the revival of traditional music and song.
Mark Kermode's Secrets of Cinema: British Comedy, 10.45pm, BBC Four
It’s season three of this hugely enjoyable and quite informative look at the Silver Screen.
The carefully coiffured returns to examines more of the techniques and conventions behind classic movie genres, beginning by looking at the tropes of British comedies.
Mark argues that they win laughs by tapping into the public's abiding national preoccupations, from rooting for the underdog to the subversion of class and manners.
He also explores the audience's fascination with comedy and crime, and pastiches and parodies that take the big beasts of Hollywood down a peg or two.
Christmas at Blenheim Palace, 8.00pm, Channel 4
For the first time cameras have been given unprecedented access to Blenheim Palace during its most important season - Christmas.
Life at the Oxfordshire mansion, a 300-year-old Baroque property set in 2,000 acres of Capability Brown-designed parkland, boasting the most extensive collections of portraits, furniture, sculpture and tapestries in Europe.
Around 250,000 visitors are expected to flock to marvel at the breathtaking state rooms and sprawling grounds transformed into an unrecognisable winter wonderland.
The palace's army of staff, volunteers and specialist teams have under three weeks to install seasonal cheer on a colossal scale.
Rich Kids of Beverly Hills, 10.35pm, Virgin Media Two
Season three of the reality show opens with an episode entitled Textgate.
EJ questions whether to invite Jonny to the Bahamas, sparking group-wide digital drama.
Brendan meets with a jeweller about an engagement ring, while Morgan models at New York Fashion week. Taylor Hasselhoff anticipates seeing her high school enemy Roxy.
Ending Today
Hector Balkans go Baltics, 9.30pm, TG4
Beginning his travels in Riga, Hector explores the city with Liva Melbarzde and discusses Latvia's Evangelical Lutheran Church with Bishop Pavils Bruvers.
That’s before experiencing a one-of-a-kind sauna and fire ritual.
Leaving the city behind Hector immerses himself in all things outdoors from investigating how trees are cut in Tukums.
Then he meets a survivalist for a crash course in survival skills and visiting Amatciems, a fascinating eco village.
