TV Guide BBC Four Tuesday

Raymond Baxter, William Woollard, Michael Rood and Judith Hann invite a party of children to their workshop, where they can enjoy magic moment of science, in a Christmas special of the science magazine programme from 1975

Two of the highest-scoring alumni teams return tonight to contest the first semi-final of the 2022 Christmas competition, with Jeremy Paxman asking the questions. Who will make it to this year's final?

Ronnie Barker and Ronnie Corbett host a Christmas show of sketches, jokes and songs, joined by their guest David Essex. First broadcast December 25 1982

Fletch plans to bring a bit of Christmas spirit to Slade Prison in the form of his own home-made booze. But when Mackay and Barrowclough uncover the stash in his and Godber's cell, the crafty con seems in danger of spending the yuletide period in solitary confinement. Festive edition of the classic comedy from 1976, starring Ronnie Barker and Fulton Mackay

Timothy gives his parents and girlfriend a tour of his new home, but it is not long before mother interferes in her son's love life. First broadcast 3 October 1988

The year is 2019, and the former staff of the Whitbury Newtown Leisure Centre gather to honour Sir Gordon and Lady Brittas at their one-time boss' castle intending to pay tribute to the great man. Chris Barrie stars in this festive instalment of the comedy. First broadcast 27 December 1994

The family are flung into more of a flap than usual as they await the arrival of their very special Christmas guests. As Sanjeev hones his interviewing technique, granny Sushila plans a surprise of her own a mistletoe ambush. with Trinny and Susannah, Darius Danesh and Mark Owen

Alan Yentob follows the comedian and actor as he publishes his autobiography in early 2020. Lenny meets up with his closest friends, family and colleagues to remember his sudden rise to fame at the age of 16 on TV talent show New Faces, which catapulted him from working-class West Midlands kid to one of Britain's most celebrated black performers. Alan explores his other TV roles on Tiswas and Three of a Kind, as well as his controversial time as the only black performer on The Black and White Minstrel Show. Lenny also discusses his recent career reinvention as a serious actor and his work as a political activist campaigning for greater diversity in entertainment and broadcasting