Insiders (RTÉ Two, 5pm)
Sarah Louise and Phil are at Walibi Theme Park in Brussels to carry out some thrilling ‘on ride’ science experiments find out which one of them is ‘Theme Park Top Dog’.
Before they begin Sarah Louise has to conquer her ‘coasterphobia’ with the help of psychologist Kevin Tracey.
Back home, Phil gets access to the construction site of Ireland’s first rollercoaster in Tayto Park and he finds time to engineer a rollercoaster of his own.
And in the lab Jennifer is putting puke under the microscope.
Cuffs (BBC1, 8pm)
You’re probably thinking that the last thing British telly needs right now is another crime drama – after all, we’ve had the likes of From Darkness, Unforgotten and River thrust upon us in recent weeks.
However, the BBC promises that this is a little different. Where the aforementioned trio focus on investigations into particular crimes, Cuffs is more about the officers themselves, the bobbies on the beat who are on the frontline every day, coming face-to-face with members of the public.
We’ll see them deal with everything life can throw at them, from a booby-trapped cannabis farm in a suburban semi and an elderly farmer’s wife with a shotgun, to middle-class dog-napping, fisticuffs between pensioners and Saturday night drinkers.
Ashley Walters, Amanda Abbington and Shaun Dooley star.
The Apprentice (BBC1, 9pm)
The contestants are instructed to tap into one of the UK’s biggest markets, with the task of choosing products for pet lovers and selling them at the London Pet Show.
Faced with an array of products, including hi-vis jackets for chickens, the entrepreneurs adopt very different tactics to seal the deal with the vendors.
However, the task looks set to unravel when one team finds it difficult to shift a range of cat-focused products, and the other team’s distracted project manager struggles to corral the customers.
Downton Abbey (TV3, 9pm)
Downton Abbey returns with the sixth and final series of the Emmy and Golden Globe award-winning drama which has become an international hit.
Series five wrapped up with Bates on the run after confessing the murder of Mr Green, leaving his Anna to walk free but live life without her husband.
Carson finally popped the question to Mrs Hughes even though she confessed she could never go into the B&B business after retirement.
Grabbers (3e, 10pm)
(2012) Grabbers is a monster comedy from Irish screenwriter Kevin Lehane and it tells the story of Ciarán O’Shea, a charming but heavy-drinking local Garda who is tasked with greeting Lisa Nolan, a straight-laced young officer who has just arrived to a small fishing village off the West coast of Ireland.
Not that there’s much for them to do, aside from dealing with the occasional drunk, and that’s usually O’Shea himself.
But strange doings are afoot: the crew of a fishing boat disappears, whales start appearing dead on the shore, a local lobsterman catches a strange tentacled creature in his trap.
Soon it becomes clear to Garda O’Shea and Nolan that there’s something big out there, and that it’s hungry.
Starring Richard Coyle (w.e, The Whistleblowers) and Ruth Bradley (Love/Hate, Titanic).
Starring: Richard Coyle, Ruth Bradley
My Mania and Me (Ch4, 11pm)
We’ve all given in to temptation every now and then, even if that means just having an extra biscuit with a cup of tea.
But the four women featured in this eye-opening documentary can’t stop themselves from giving in to their wildest desires. Kim cannot stop stealing, Crystal has to have sex every day, Hayley is gambling away her family’s fortunes and Kezia spends thousands on clothes she never wears.
At first glance, you may accuse them of just being weak-minded and somewhat silly, but delve deeper and it’s clear that they simply can’t control their behaviour – and that they desperately want to.
Here, the quartet discuss how suffering from Impulse Control Disorder has taken over their lives, while scientists describe the research they’re carrying out in the hope of finding a cure.
The Vampire Diaries (ITV2, 11pm)
Steady ladies – handsome hunks Paul Wesley and Ian Somerhalder are back with the seventh season of the supernatural drama.
Damon is a shadow of himself when we catch up with him – his girlfriend Elena is in a coma, leaving him to deal with whatever life has to throw on him alone.
Well, not quite. Bonnie decides to become his moral compass, while he tries to help Alaric deal with his own tragedy.
Paul’s news isn’t much happier – he’s still waiting for Caroline to sort out her emotions, so throws himself into protecting Mystic Falls from Lily and her family of heretics.