RTÉ dominates Christmas TV ratings

9.00pm Sky 1

It's the fourth and final part of this watercoooler drama. So what can we expect from this week's conclusion? Well, the boys' hostage experience is interrupted by the unexpected extension of an olive branch. Woody, Quinn, Baxter and Rick can win back their freedom in return for completing a seemingly impossible quest and, for once, fortune is in their favour and it looks like they might succeed. (Although with a third series on its way, perhaps their actions are not without a price.)

9.00pm BBC One

John, Chris and Marcus have made a decision that will change the rest of their lives and set about making their big idea a reality. The three men do their best to discuss their plan without arousing suspicion. Their first big challenge is to employ the muscle to carry off the heist. Marcus has a connection: a businessman called Kalpesh who can help them with the guns and the men they need, but he wants to see cash to prove they are serious. John has been put forward for a promotion at work. He gets a pep-talk from his boss on how to assert himself more, but instead of getting the job he uses the advice to help him take control of the group. When Marcus looks like making a mess of the deal with Kalpesh, John has to step in and close the deal.

7.50pm More 4

Phil's latest secret assignment takes him to Watford and the four-bed detached house of John and Mirasol Lockwood. Not long after moving in, the family divided up their huge plot and started to build their dream family home right next door. Now their original home is being outshone by its newer, flashier neighbour, which is getting all their love, care and attention. After six months on the market, their new house nearing completion, and a baby on the way, the pressure is most certainly on to shift it fast. Now Phil's on the case, sorting out this lifeless, tired, forgotten house, but the family need to face up to a few home truths and muck in with Phil's plan to get their house sold and then moved next door.

8.00pm TG4

This hugely popular series chronicling the story of Ireland's railways returns to our screens tonight with a new series. Bóithre Iarainn is a unique window into the life of ordinary Irish people in the first half of the 20th Century, from the delights of the dance trains to Bray on the Harcourt street line to the gruelling work of shovelling coal on the Cavan and Leitrim line, to the constant hum of the beet trains from Courtmacsherry in West Cork, the lifeblood of the countryside. Tonight's opening episode recalls the famous 'locked train' which travelled cross-border from Dundalk to Bundoran carrying a mixed bunch of honeymooners, smugglers and Lough Derg pilgrims.