Terrestrial EastEnders BBC1, 7.30pm Peggy and Roxy 'ave an appointment wiv a dress designer, but Archie 'as his own ideas abaht 'ow Peggy's wedding dress should look. "It needs ta be shorter and more see-froo," he snarls. Stacey and Jean appear to have reached a turning point in their relationship, but is Callum about to throw a spaniel in the works?

Jimmy Doherty In Darwin's Garden BBC2, 8pm Jimmy Doherty, quasi-scientist and playboy pig-farmer, recreates some of Chuck Darwin's groundbreaking experiments to get closer to understanding his theory of evolution and reveal the untold story of Darwin as an ingenious experimentalist. Filmed largely in Darwin's gardens at Down House in Kent, Jimmy uses his hero's notebooks to carry out the hands-on experiments that Darwin undertook following his expedition on The Beagle. Many of these experiments have never been done since Darwin first designed them 150 years ago, and they help Jimmy gain a truly original insight into the theory of evolution.

Red Riding Channel 4, 9pm Yorkshire in the 1970s and 80s, 'appen, a time of paranoia, mistrust and institutionalised police corruption. Rookie journo Eddie Dunford (Andrew Garfield) pursues truth in an increasingly complex maze of lies and deceit that characterises the police investigation into a series of child abductions. Adapted from David Peace's cult noir novels, featuring Sean Bean, Anthony Flanagan, Warren Clarke, Rebecca Hall, Eddie Marsan, David Morrissey and Peter Mullan.

Digital Silver Streak Film 4, 6.40pm Gene Wilder and Richard Pryor star in a comedy thriller set aboard a Los Angeles-Chicago train. Publisher Wilder witnesses a murder and thief Pryor helps to hide him as Patrick McGoohan and his gang of baddies close in. It harks back to those British thrillers of the 1930s - The 39 Steps and The Lady Vanishes - with added modern screwball antics. Yummy Jill Clayburgh bids to sort the men from the boys.

Natalie Cassidy's Real Britain BBC3, 8pm Ex-EastEnder Cassidy explores the fame game with two people who are learning the rules. Lauren Luke is a Youtube phenomenon who gives make-up tips from her bedroom. She's about to launch her own make-up line, but is she ready for the fame that comes with success? Nicky Avery was the youngest man in Britain to be diagnosed with breast cancer. He's beaten the disease and now hopes to build a media career.

Fire in the Sky Film 4, 9pm In 1975, six loggers working in the mountains of Arizona, driving home at night, see a red glow in the sky. They have discovered a UFO hovering in the sky. One of the party is sucked up by outer-space goomers and the craft disappears. His buddies have some explaining to do.

Radio The Hunt for U12 Radio Scotland, 11.30am For 93 years the wreck of the stricken U boat had lain undetected on the seabed of the Firth of Forth. Then, in 2008, Scottish divers, Martin Sinclair and Jim MacLeod struck lucky by locating the remains of the vessel whose loss had claimed 19 submariners' lives. This is the story of two men's personal odyssey to reclaim forgotten history. And at 2.15pm the Afternoon Play features The State of the Art, a dramatisation of the Iain M Banks novella about the Culture ship, Arbitrary, which arrives on earth to find the planet on the edge of self-destruction. Antony Sher stars.