TV tonight: US period drama that was nominated for an Emmy finally airs on UK television

Companions follows the secret affair between Hawkins Fuller and Tim Laughlin in 1950s Washington. Also: Louis Theroux on Artist of the Year portrait. Here's what to watch tonight at 10pm on Channel 4 from the makers of Homeland: this beautiful, weighty, Emmy-nominated drama finally airs on UK television. It is both a romance and a thriller, following Hawk (Matt Bomer) and Tim (Jonathan Bailey) in Washington D.C. at the height of McCarthy

From the creators of Homeland, this gripping, gritty, Emmy-nominated drama is finally coming to UK TV. It's both a romance and a thriller, following Huck (Matt Bomer) and Tim (Jonathan Bailey) as they meet in Washington DC during the height of McCarthyism and have sex over the next three decades. Holly Richardson

More emotional stories from inside the workshop and across the UK. Does a recording device come alive when connected to three continents? And is there any hope for the 1950s Roliflex camera that once took portraits of the royal family but is now in need of a very delicate restoration? Hannah J. Davis

Louis Theroux is the first brave celebrity to sit on his portrait in this week's competition. "If you do the splatters, it'll be fine," he assures them. Former White House communications director Anthony Scaramucci and former actress Joanna Scanlan also sit in the chair. As is becoming tradition, there will be tears for one of them. Human resources

Queen Camilla inherited a love of reading from her father, who found solace in literature while held in a German POW camp. In this one-off documentary, he talks more about his passion for books before meeting four people whose lives have also been changed by the story. Human resources

When Bristol police look into the double shooting of a couple in their home, they're treated to a standard quagmire, but Richard Armitage's brilliant eponymous pathologist provides all the breakthroughs. Secrets and betrayals are treated like intense psychological dramas. Jack Seal

Twenty-five years ago, Chris and Gail opened a 19th-century woolen mill near Huddersfield, restoring its historic shell while filling the interior with steel, glass and high-tech gadgets to rival a gang villain. Now Kevin McCloud is back to say "hmm". Does the couple's radical approach still seem cutting-edge — or simply very, very 2001? Ali Cattrall

Track Cycling: World Championships, 11:30 a.m., TNT Sports 1

Day one from Shanghai, China, with Emma Finucane due to feature.

UEFA Champions League Football: Lesk v Liverpool, 5pm, TNT Sports 2 Man City v PSG, 7pm on TNT Sports 1. Aston Villa and Fenerbahçe will be broadcasted on TNT Sports 2 channel at 19:45.