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

Borstal Boy (TV3, 9pm)

A biopic of the Irish poet Brendan Behan, beginning as a 16-year-old Behan is imprisoned in Borstal after a Republican bombing mission is thwarted. Directed by Peter Sheridan and starring a young Danny Dyer as Behan’s pal Charlie Milwall.

What’s The Right Diet For You? A Horizon Special (BBC2, 9pm)

Ah look, just as you were about to give up on your New Year’s resolution. A team of scientists selected 75 clinically obese people and tailored a diet and weight loss programme to explore three root causes of obesity: genes, hormones and emotional eating.

Nature’s Weirdest Events (BBC2, 8pm)

New series of the nature programme presented by Chris Packham, who explores strange happenings around the globe. Tonight, he investigates the scores of pigs found swimming in the Caribbean and a tick that is turning America vegetarian. Interesting.

Everyone’s talking about… #PennyDreadful

Season 2 of the fantasy/horror TV series is on the way, and the trailer was released yesterday – it gives a sneak peak of more monsters, more of Eva Green being a badass, and more of the lovely Dublin set.

Or switch over for…

• Midsomer Murders (UTV Ireland, 8pm) Drama. An eccentric couple come under scrutiny when a man is killed.
• 24 Hours In Police Custody (Channel 4, 9pm) Tales from a police drunk tank.
• Silent Witness (BBC1, 9pm) The drama wraps up in part two of the miniseries.
• The Mentalist (RTÉ One, 10.15pm) New series of the crime drama.
• Mad City (BBC1, 11.50pm) John Travolta and Dustin Hoffman star in this drama about a man who holds a museum hostage.

More: Actor Kyle MacLachlan will return to Twin Peaks for new miniseries>