The Big Bang’s Biggest Bangs (E4, 6pm)

FOR years it was one of the world’s funniest sitcoms, a love letter to geeks with some of the sharpest scripts in Hollywood. It helped make stars of Jim Parsons and Kaley Cuoco, and its success also attracted some of the most beloved names in showbusiness, from Leonard Nimoy to Stan Lee. In this new offering, fans of the show discuss some of the biggest, funniest and nerdiest moments from the show.

Mountain Vets (BBC2, 7pm)

VET Rachael Frew heads out to a pre-booked appointment with a farmer she knows well. Damien produces meat from a large herd of Dexter cattle and his prize possession is bull Charlie, who has won several awards. Damian has had his eye on a young bull to follow in Charlie’s footsteps, but it is not working out. Elsewhere, tests are carried out on a Yorkshire terrier that has stopped eating, stable-hand Caroline prepares cow Daisy for her first competition at the Balmoral Show and Inge D’Haese uses all of her skills to perform a tricky procedure to correct a horse’s stance.

The World’s Most Expensive Christmas Cruise Ship (C5, 8pm)

YULETIDE life on the world’s most expensive cruise ship, the Seven Seas Explorer. It might be 30 degrees as the ship basks in the sunshine of Miami, the Cayman Islands and Mexico, but that doesn’t prevent cruise director John from donning his Santa suit and warming up the vocals for his special Christmas show. In the four galleys, the vessel’s 88 cooks prepare the most luxurious food at sea, as the guests enjoy excursions to meet Stingrays in the Caribbean sea.

A Question of Sport at 50 (BBC1, 11pm)

ORIGINALLY airing regionally in 1968, the first-ever episode of A Question of Sport aired nationally on January 5, 1970, and was hosted by David Vine. The team captains were boxer Henry Cooper and Wales rugby union star Cliff Morgan, and they were joined by George Best, Ray Illingworth, Lillian Board and Tom Finney.