Brexit: The Uncivil War. C4, 9pm

JUST when you think there can’t possibly be anything new to be said about Brexit, along comes Benedict Cumberbatch in this drama from award-winning writer James Graham, which offers a compelling, behind-the-scenes look at the referendum campaign. It explores the run-up to the vote from the perspective of the strategists on different sides, including Dominic Cummings (Cumberbatch), campaign director of Vote Leave, and Craig Oliver (Rory Kinnear), Prime Minister David Cameron’s director of communications, who oversaw Remain. The drama explores how their decisions contributed to one of the most controversial results in modern political history.

Chris Tarrant: Extreme Railway Journeys, C5, 9pm

THE broadcaster returns to find out how railways have been central to the history of four different parts of the world. He begins on a journey across the Alps, starting in Vienna, before navigating one of the worst avalanche zones in the world. He then heads to St Moritz on a railway that was made possible in part by British holiday pioneer Thomas Cook, before boarding two steep cog railways to climb up the north face of the Eiger to reach the “Roof of Europe”.

Two Doors Down, BBC2, 10pm

THE sitcom returns, and newcomers are joining the neighbourhood, in the form of Alan (played by professional wrestler Grado, aka Graeme Stevely) and Michelle (Joy McAvoy). In the first episode Beth and Eric think they are going to escape the street as their son Ian is taking them out for a 30th anniversary dinner. It turns out that’s just a ruse as he and his boyfriend Gordon have planned a surprise party in Beth and Eric’s own house – and all the gang is there. Before long, the champagne is flowing, but Ian could be left wishing he’d booked a restaurant after all when a drunken Cathy thinks this is the perfect time for him to pop the question. If that wasn’t enough to take the spotlight off the happy couple, Cathy decides to treat everyone to a replay of her first wedding dance.