TV Guide 5SELECT

Jacs asserts her authority in the laundry when Bea tries to take over the sewing from Doreen, prompting Franky to defuse the tense situation. Governor Davidson implements a new procedure after an incident with Toni in solitary, leading to objections from her officers, while Bea's daughter Debbie is strip-searched during a visit when the sniffer dogs detect an illegal substance. Drama, starring Danielle Cormack, Nicole da Silva and Kris McQuade

Ronnie Katsis's young daughter collapses soon after passing through the security checks at visiting time, and the women are furious that she is being used as drug mule. Liz Birdsworth looks on in horror as she is reminded of a near-fatal accident involving her son, and suspecting Jacs is responsible, Bea worries that a similar fate is being planned for Debbie. Meanwhile, Will Jackson continues the hunt for his wife's killer and Jacs looks forward to a visit from her husband Vinnie. Prison-set drama, guest starring former Neighbours actresses Carla Bonner, Annie Jones and Anne Charleston (the latter also being the only one of the original Prisoner: Cell Block H cast to appear in Wentworth Prison)

Helen Skelton and Alex Langlands head to the village of Poulton in Cheshire to see a location where archaeologists have dug up nearly 1,000 human skeletons. The remains have revealed secrets about life during the Black Death, including signs of backbreaking agricultural work, poor nutrition and battles

Helen Skelton and Alex Langlands explore the history of Stonehenge, examining the stones that make up the structure, their acoustic properties, and how they were transported 120 miles from their origins in Salisbury Plain to form the circle. Helen also visits a village where builders were believed to have lived during the site's construction and meets scientists who have analysed the bodies buried beneath the monument, including the remains of a man who is believed to have come to Stonehenge all the way from Switzerland

Archaeologists and presenters Raksha Dave and Alex Langlands join a team from Reading University at a site in Silchester, near Reading, as they examine one of the best-preserved Roman sites in Britain

A wealthy man due to marry a younger woman is electrocuted in the bath. Columbo suspects the victim's identical twin nephews - a flamboyant TV chef and a conservative banker - who stand to inherit his fortune if he died unmarried, but the detective is unsure which of them is the guilty party. Drama, starring Peter Falk, and Martin Landau in a dual role. With Paul Stewart, Julie Newmar and Jeanette Nolan

A philandering psychiatrist, who involved his mistress in a series of hypnosis experiments, kills her husband in the heat of the moment when the pair are caught out. He persuades his distraught lover to make up a story involving two burglars, but Lt Columbo realises she is lying and goes in search of the truth. Crime drama, starring Peter Falk, George Hamilton and Lesley Warren

A vicious gossip columnist digs the dirt on an ageing film actress, who responds by taking on her most challenging role yet - as a real-life murderer. But when the actress kills her own assistant in error, she looks for a way to shift the blame. Crime drama, starring Peter Falk, Anne Baxter, Mel Ferrer, Kevin McCarthy and multi-Oscar-winning costume designer Edith Head in a guest appearance as herself

A successful photographer wants to get rid of his nagging wife so he can pursue an affair with his assistant. He murders his spouse and makes it look as if she was killed by a kidnapper, and at the same time puts an ex-con in the frame. However, the dogged detective sees through his ruse and proceeds to pick the story to pieces. Crime drama, with Peter Falk, Dick Van Dyke, Don Gordon and Antoinette Bower

Naturalist and explorer Steve Backshall and wildlife presenter Michaela Strachan reveal the hidden secrets of the Ice Age, using state of the art technology to bring this frozen world to life. In the first episode, the duo witness the rise of giant beasts such as the woolly mammoth and sabre-toothed tiger, revealing how they were perfectly adapted for this extreme environment, and what factors let to their extinction. Later, Michaela travels deep into the Arctic Circle to try and solve the puzzle of how and why the Ice Age started in the first place

Naturalist and explorer Steve Backshall and wildlife presenter Michaela Strachan reveal the hidden secrets of the Ice Age, using state of the art technology to bring this frozen world to life. The second episode sees the pair travel the world to discover how Neanderthals and Homo sapiens survived at a time of brutal environmental change, and uncover why Homo sapiens lived on while the Neanderthals were wiped off the face of the Earth

Steve Backshall and Michaela Strachan reveal how the Great Thaw triggered the end of the Ice Age and changed the world as we know it