Sandi Toksvig looks at ruffs and red things with Alan Davies, Tom Allen, Susan Calman and Zoe Lyons.

Sandi Toksvig gets railroaded into a road- and rail-themed episode of QI, with Alan Davies, Aisling Bea, Cally Beaton and Holly Walsh.

Sandi Toksvig invites viewers to join her in the QI restaurant, with Alan Davies, Phill Jupitus, Sara Pascoe and Mark Watson.

Sandi talks rubbish with Alan Davies, Bridget Christie, Jonny Vegas and Holly Walsh.

Sandi Toksvig hosts an absolutely ridiculous episode of QI, with Alan Davies, Maisie Adam, David Mitchell and Holly Walsh.

Sandi Toksvig examines some revolutionary ideas with Alan Davies, Gyles Brandreth, Susan Calman and Jessica Fostekew.

Sandi Toksvig reflects on this and that in an episode themed around reflections, with Alan Davies, Zoe Lyons, Joe Lycett and Liza Tarbuck.

Sandi Toksvig tunes in for a bit of 'Radio' activity.

Sandi Toksvig indulges in a bit of well-earned R&R with Alan Davies, Stephen K Amos, Susan Calman and Lou Sanders.

Sandi goes roaming with Alan Davies, Sara Pascoe, Josh Widdicombe and Benjamin Zephaniah.

It's Christmas, so time to rejoice with Sandi Toksvig and guests Holly Walsh, Justin Moorhouse, Chris McCausland and Alan Davies.

Sandi Toksvig goes Rogue with Bill Bailey, Jack Carroll, Olga Koch and Alan Davies.

Sandi Toksvig is joined by Bill Bailey, Daliso Chaponda, Sally Phillips and Alan Davies for a completely random selection of quite interesting information.

Sandi Toksvig talks about rocks, rolls and rock 'n' roll with Bill Bailey, Katy Brand, Eshaan Akbar and Alan Davies.

Sandi Toksvig discuss animals which start with an 'R' with Tom Allen, Ed Gamble, Maggie Aderin-Pocock and Alan Davies.