Sandi Toksvig looks at Operations. If you've ever wondered how to turn a muffin into an offensive weapon, this is the show for you. With Bill Bailey, Katherine Ryan, Rhod Gilbert and Alan Davies. 8/16
Sandi Toksvig hosts the QI Christmas special, with Jason Manford and Romesh Ranganathan. 9/16
Sandi Toksvig looks into some origins with Josh Widdicombe, Susan Calman, Rich Hall and Alan Davies. 10/16
Frank and Lu investigate a missing person's case at a casino, where gambling is a matter of life or death. 7/10
When an amnesiac wanders into their lives, Frank and Lu must work out what happened to him. 8/10
Frank and Lu investigate a death threat at Runningbrook, an exclusive tennis club which hides a toxic threat. 9/10
The bakers are set the task of making two sharing-size pizzas in 2 hours for the signature challenge. The technical challenge, set by Paul, was the baking of 12 pain aux raisins. 3/10
The bakers take on the sweet bread pan dulce and tackle a Mexican street food staple, before they make a showstopping version of the milk-soaked tres leches cake. 4/10
The bakers get all steamed up in the Signature, tackle a classic lemon meringue pie in the Technical, and create a showstopping sponge cake with a hidden surprise. 5/10
In the first heat four contestants follow a tricky recipe for biscotti and lemonade, and create show stopping racing-themed cakes. 1/15
The bakers are challenged to master James's melt-in-the-middle chocolate fondant and make a cake inspired by the jungle. 2/15
With a place in the semi-finals at stake, the bakers are tested on their know-how in the technical Challenge, where they will try to master Mary Berry's recipe for marble cake. 3/15
Ben visits a former war journalist to find out what took his host to live a quieter life on a remote island in Lake Victoria. 1/8
Twelve brand new sewers follow the pattern for a twist top, transform office wear and create cut-out, made-to-measure dresses. 1/10
Discover the astonishing four-billion-year story of the place we call home. 3/5
After a life spent travelling the world, Sir David Attenborough returns home to show us the hidden natural wonders of his favourite place on earth. 1/1
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
In Texas, Simon joins the US Border Patrol, who pick up migrants who have illegally crossed the Rio Grande river in search of a new life. 4/5
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