E1 - Ologies

Aired: October 20, 2017

In the first episode of the 'O' series, Sandi Toksvig sets out in search of 'Ologies' and 'Odoxies' - and finds out how an amusement arcade helped to win the Cold War, meets a lizard with three eyes, and much else besides. The guests are Bill Bailey, Phill Jupitus, Claudia Winkleman and Alan Davies.

E2 - Organisms

Aired: October 27, 2017

Sandi Toksvig looks at multiple Organisms. Where else are you going to meet the world's deadliest hunter, a photographer hidden inside an ox, and a juggling otter, all in the same room? With Nish Kumar, Cariad Lloyd, Holly Walsh and Alan Davies.

E3 - Oceans

Aired: November 03, 2017

Sandi Toksvig looks at the oceans. Tune in to hear one publisher's suggestion for a radical improvement to Moby Dick. With Aisling Bea, Joe Lycett, David Mitchell and Alan Davies.

E4 - Over and Ova

Aired: November 10, 2017

Sandi Toksvig looks at over and ova. Learn some tricks you can do with eggs, meet a flying pig and join in as the studio audience sings along with western film themes. With Bill Bailey, Jan Ravens, Grayson Perry and Alan Davies.

E5 - Odorous and Odious

Aired: November 24, 2017

Sandi Toksvig considers all things Odorous and Odious. Why is the world's second-smelliest man so frustrated? Sandi has the answer. With Nish Kumar, Sally Phillips, Ross Noble and Alan Davies.

E6 - Odds and Ends

Aired: December 01, 2017

Sandi Toksvig considers various odds and ends. Ever wondered how to tell a schnauzerorgan from a paddywhack? With Matt Lucas, Romesh Ranganathan, Liza Tarbuck and Alan Davies.

E7 - Opposites

Aired: December 08, 2017

Find out how to sort the sheep from the goats, discover the opposite of Tarzan, and meet the telescope that points straight through the Earth. With Jimmy Carr, Colin Lane, Sara Pascoe and Alan Davies.

E8 - Operations

Aired: December 15, 2017

An unconventional look at the theme Operations. With Bill Bailey, Katherine Ryan, Rhod Gilbert and Alan Davies.

E9 - O Christmas

Aired: December 26, 2017

Sandi Toksvig hosts the QI Christmas special, with Jason Manford, Romesh Ranganathan, Holly Walsh and Alan Davies. Learn the best way to wrap an awkwardly shaped present and how to get wine stains out of the carpet.

E10 - Origins and Openings

Aired: January 05, 2018

Sandi Toksvig looks into some origins and openings, with Josh Widdicombe, Susan Calman, Rich Hall and Alan Davies. Tune in to hear what Mr First thought of Mr Second, and much more.

E11 - Objects and Ornaments

Aired: January 12, 2018

Sandi Toksvig looks at some objects and ornaments. Along the way, discover where you can find an actual UFO and meet the world's best-dressed crab. With Sarah Millican, Cariad Lloyd, Alice Levine and Alan Davies.

E12 - The Occult

Aired: January 19, 2018

Sandi Toksvig looks into the occult. Ever wondered how a Hand of Glory can make you rich? Sandi has all the answers. With Aisling Bea, Russell Brand, Noel Fielding and Alan Davies.

E13 - Omnishambles

Aired: January 26, 2018

Sandi Toksvig organises an omnishambles with Josh Widdicombe, Stephen K Amos, Cally Beaton and Alan Davies.

E14 - Oddballs

Aired: February 02, 2018

Sandi Toksvig looks at some oddballs with Jason Manford, Jimmy Carr, Victoria Coren Mitchell and Alan Davies.

E15 - Occupations and Offices

Aired: February 09, 2018

Sandi Toksvig looks into occupations and offices with Deirdre O'Kane, Richard Osman, David Mitchell and Alan Davies.

E16 - Overseas

Aired: February 16, 2018

Sandi Toksvig ventures Overseas to find out about who keeps their brothers in a cage, and much more. With Bill Bailey, Colin Lane, Desiree Burch and Alan Davies.

E17 - VG Part One

Aired: February 23, 2018

A compilation of some of the best bits from Series O, with Sandi Toksvig and Alan Davies.

E18 - VG Part Two

Aired: March 02, 2018

More of the best bits from Series O, with Sandi Toksvig, Alan Davies and guests.