DailyEdge.ie rounds up the TV shows that you’ll be tweeting about tonight and talking about tomorrow.

Liar (TV3, 9pm)

The final episode of this thriller (about the fallout of a date gone horribly wrong) aired on ITV on Sunday, but we can finally catch it over here tonight – without spoiling too much for anyone, it’s a hell of a nailbiter. #liar

15 Billion Light Years From Birr (RTÉ One, 10.15pm)

This documentary tells the story of the construction of one of the world’s most advanced telescopes on the grounds of Birr Castle. Jonathan McCrea presents.

Gordon Ramsay on Cocaine (TV3, 10pm)

Sadly, this is not an hour of Gordon Ramsay rambling around off his face. Instead, the celebrity chef investigates the cocaine trade in Britain, the biggest user of the drug in Europe. #gordononcocaine

Everybody’s talking about: One Tree Hill

Namely, Chad Michael Murray’s Instagram from the show’s iconic bridge:

The actor was on the way to Wilmington, North Carolina for the annual One Tree Hill convention (yep, there’s a convention) where there was a giant cast reunion. Some of them look happier to be there than others.

Or flick over for…

• The Supervet (Channel 4, 8pm) Noel Fitzpatrick cares for a shih-tzu and a Labrador both suffering from severe arthritis.
• The Sunday Game Championship Draw (RTÉ2, 8.30pm) Marty Morrissey presents the fixtures for the 2018 Gaelic championship.
• Victoria (be3, 9pm) The second season of the historical drama finishes up.
• The Ganges with Sue Perkins (BBC1, 9pm) Sue treks along the sacred river, from the Himalayas to the Bay of Bengal.
• GBBO: An Extra Slice (Channel 4, 10pm) Jo Brand is joined by this week’s unjustly ousted contestant to discuss what went down.