TV Guide BBC Two Wednesday

At 1.12am, the liner is going down fast and there are more than 2,000 people still on board, but without enough lifeboats to go around and no rescue mission in sight, everyone left faces a struggle for survival. As the situation gets more urgent, and in the face of a scramble to get in the remaining lifeboats, guns are handed out to the senior officers to maintain order

Derek Brockway treks from Harlech to Barmouth, stripping down to basics as he crosses a nudist beach in Gwynedd. On this walk along one of Wales' most popular coastlines, Derek also rolls a cheese down the world's steepest hill and learns about the 'Devil in the Shawl' when he visits an old village chapel. Along his journey, he nearly gets caught out on a tidal causeway and meets a team of women who give up their free time to keep the beaches clean and safe for wildlife

The Rev Richard Coles joins Robson to explore the Northumberland coastline, with the pair taking a Canadian canoe trip along the Coquet river and visiting the hidden gem of Walkworth's secret hermitage. They also make the crossing to Lindisfarne for a photography class and have a go at rope work

Game show in which contestants are tested on their mental abilities in head-to-head rounds. Hosted by Clive Anderson

Penelope Keith learns about Georgian menus and Paul Martin travels to China to check the making of a spectacular piece of wallpaper. Elsewhere, tempers become frayed over the royal bed, and the opening of the Victorian kitchen garden is threatened by the unexpected invasion of an endangered species

The curators continue their restoration of Paul McCartney's childhood home in Liverpool, trying to track down a key section of wallpaper for the living room, and opening up a room the public has not yet seen - the bedroom where the former Beatle's parents slept. Across town, a project is under way to catalogue and clean a vast collection of photographs discovered in a four-storey Georgian house that was once the home and studio of Edward Chambré Hardman, one of Britain's most significant photographers

David Attenborough observes the wildlife of the desert-like west and south of the island, an area where dry spells can last months and survival is a struggle. Verreaux's sifakas live among trees with potentially lethal spikes, while the baobab trees house mouse lemurs, primates that feed on the droppings of fluffy bugs. During the toughest time of year, gangs of ring-tailed lemurs try to raise their young, and as the rains arrive, the year-long life cycle of the Labord's chameleon begins

Paul Martin presents from Longleat in Wiltshire, where experts Claire Rawle and David Fletcher value items brought in for examination by members of the public, including an autograph album that evokes the glamour of bygone eras, and a marble statuette that previously found use as a goal-post for backyard football practice. Paul also gets up close and personal with some of the region's most exotic residents as he relates the history of Longleat Safari Park

The last wooden lifeboat leaves and the passengers and crew face their fates, with reactions ranging from the captain's shocked resignation, to designer Andrews' desperate bid to help others. Those in the lifeboats watch in horror as explosions boom, sparks fly and Titanic splits in two, with the lifeboat occupants facing a dilemma - to risk saving others or to prioritise their own survival

Drama, starring Josh Finan as a teacher leading a philosophy class in a prison. On his first day, the lesson soon unravels as he realises he's underestimated his audience - and the weight of his own past. Fixating on small details, Dan loses control, risks his chance to become a father and breaks an important promise. When a familiar face resurfaces, he is forced to confront someone he thought he'd left behind

Amanda Holden and Alan Carr renovate a derelict property on the Greek island of Corfu, intending the finished home to be sold with the proceeds going to charity. With ivy growing through the windows, hay and mud as a floor, a sewage pipe running through the downstairs plus a roof on the verge of caving in, their new project resembles a stable more than a house. While working on the project, the duo embrace the indigenous culture, make new friends and throw themselves into local life