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.

Sandi Toksvig looks at quacks and quackery with Alan Davies, Claudia Winkleman, Stephen K Amos and Victoria Coren Mitchell.