Pick of the weekThe Traitors Ireland Series 2Sunday, RTÉ One, 9.30pmThe first season of The Traitors Ireland was an unqualified success for RTÉ last year, with more than 600,000 people tuning into the first episode alone. Siobhán McSweeney made a fantastic host, harnessing her dramatic side while also keeping a bit of warmth intact – perfect for keeping the contestants on their toes. Now comes series two and a new group of strangers heading to Slane Castle to play a murder mystery game that will net the winner €50,000. We’re told that there’s a twist early on that “causes immediate confusion amongst the group”. Ordinarily that might sound bad, but with The Traitors the more drama the better. Tonight the new contestants meet for the first time, and are sorted into Traitors and Faithful. Will this reach the heights of series one? Here’s hoping.HighlightsVigil Sunday, BBC One, 9pmVigil: Suranne Jones and Rose Leslie. Photograph: Mark Mainz/World Productions/BBC The third season of Vigil kicks off this week, which means the return of the always compelling Suranne Jones and Rose Leslie as DCI Amy Silva and DI Kirsten Longacre. In this six-part crime thriller series, they’re sent to the chilly confines of a remote Arctic research station to investigate the fatal shooting of a member of a secret British special forces mission. Because the weather is so bad, the presumption is that the killer is still afoot locally. This leaves just a small number of suspects. But – surprise! – the seemingly easy task turns out to be anything but. There are definite True Detective series four vibes here, but without the supernatural twist.Trigger Point Sunday, ITV1, 9pmTrigger Point: Vicky McClure and Eric Shango. Photograph: ITV Trigger Point has been a huge success for ITV to date – the previous three series have been streamed a whopping 91 million times. Now comes the six-part fourth series focusing on bomb disposal expert Lana Washington (the great Vicky McClure) and her colleagues. This time the new threat is posed by professional mercenaries intent on sowing chaos in London. If you’re a fan of tense thrillers, or series like Slow Horses and Line of Duty (Jed Mercurio, executive producer of Line of Duty, is also an EP here), this will be right up your street. Tea with Judi Dench Featuring Sir Ian McKellenMonday, Sky Arts, 9pmTea with Judi Dench Featuring Sir Ian McKellen. Photograph: Sky