Sean Lock and Bob Mortimer compete with Jon Richardson and his wife, comedian Lucy Beaumont. Adam Buxton, Joe Wilkinson and TV presenter (and Jon's secret crush) Anthea Turner drop in. Susie Dent, Rachel Riley and Jimmy Carr host. 1/11
Sandi Toksvig looks at plants with Alan Davies, Sara Pascoe, Stephen K Amos and Jason Manford. 8/16
Sandi Toksvig has a Christmas knees-up in the pub with Alan Davies, Cariad Lloyd, Josh Widdicombe and Noel Fielding. 9/16
Sorting the fact from the fiction this week are guests Gyles Brandreth, Will Kirk, Tasha Ghouri and Jessica Knappett. 5/13
Our celebrity panel try to guess the identities of celebrities singing inside extravagant costumes which hide their identities. 5/8
Sandi Toksvig finally gets round to a bit of procrastination with Aisling Bea, Holly Walsh, Nikki Bedi and Alan Davies. 12/16
Sandi Toksvig considers various phenomena with Alan Davies, Josh Widdicombe, Cariad Lloyd and Paul Sinha. 13/16
Sandi Toksvig looks at pathology with Sindhu Vee, Rhod Gilbert, Ed Byrne and Alan Davies. 14/16
The remaining contestants compete in the first semi-final and are challenged to bake savoury tarts for a sports match. Presented by Aaron Craze. 9/15
The Roadshow visits the Bishop's Palace in Wells in Somerset, where treasures include a precious ring from Thailand and a plaque from a pub that could be of national importance. 9/20
Twelve brand new sewers follow the pattern for a twist top, transform office wear and create cut-out, made-to-measure dresses. 1/10
Bake Off's back with new presenter Alison Hammond joining the team. It's Cake Week. The new bakers make vertical layers, choccu cake and a showstopping sponge animal menagerie. 1/10
A simple missing persons case takes a dramatic turn as Frank and Lu find themselves in the middle of a dispute over the opening of a new arts centre where it's clear that no-one is who they seem. 5/10
Sandi Toksvig looks at the pastimes of past times with Alan Davies, Joe Lycett, Phil Wang and Ellie Taylor. 15/16
Sandi Toksvig opens the post with Alan Davies, Matt Lucas, Holly Walsh and Susan Calman. 16/16
Sandi Toksvig looks at some quirky questions with Alan Davies, Loyiso Gola, Jason Manford and Sarah Millican. 1/8
The team return to the Royal Botanic Garden Edinburgh, where finds include a set of traditional Highland dress. Fiona gets a closer look at a plant specimen collected by Charles Darwin. 10/20
The sewers face three challenges inspired by travel. They are asked to create a rucksack, a swimsuit and to transform windbreakers. 2/10
It's Biscuit Week and the bakers get stuck into a marshmallow Signature and a custard classic, and make their favourite meal out of biscuits in an illusion-themed Showstopper. 2/10
The remaining contestants compete in the first semi-final and are challenged to bake savoury tarts for a sports match. Presented by Aaron Craze. 9/15
The final four young bakers battle for a place in the semi-finals by baking crumpets and insect-themed biscuits. Presented by Aaron Craze. 10/15
Frank and Lu enter the competitive world of hairdressing and find themselves combing through a tangled web of backstabbing and deceit. 6/10
When a young nun is found dead in her smoke-filled bedroom what first appears to be a tragic accident turns into a murder investigation. 2/8
Sandi Toksvig looks at plants with Alan Davies, Sara Pascoe, Stephen K Amos and Jason Manford. 8/16
Sandi Toksvig has a Christmas knees-up in the pub with Alan Davies, Cariad Lloyd, Josh Widdicombe and Noel Fielding. 9/16
When an old acquaintance of DI Perez dies in a suspicious car accident on the island, he wonders whether his journalist friend had uncovered a story that cost him his life. 3/6
After a second body is found brutally murdered on Shetland, DI Perez wonders if the two killings are connected to corporate greed and corruption on the island or to just one woman - Evie Watt. 4/6
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