QI: Series A-D

The first four series of the comedy quiz show centred around interesting, little-known information and common misconceptions.

Hosted by Stephen Fry, with sidekick and team captain Alan Davies, each series uses a letter of the alphabet to produce the questions and challenges.

Series A episodes are: 'Adam', 'Astronomy', 'Aquatic Animals', 'Atoms', 'Advertising', 'Antidotes', 'Arthropods', 'Albania', 'Antelopes', 'Aviation', 'Arts' and 'Advent'.

Series B episodes are: 'Blue', 'Birds', 'Bombs', 'Bible', 'Bears', 'Beavers', 'Biscuits', 'Bees', 'Bats', 'Bills', 'Beats' and 'Birth'.

Series C episodes are: 'Campanology', 'Cummingtonite', 'Common Knowledge', 'Cheating', 'Cat's Eyes', 'Cockneys', 'Constellations', 'Corby', 'Creatures', 'Cleve Crudgington', 'Carnival' and 'Combustion'.

Series D episodes are: 'Danger', 'Discoveries', 'Dogs', 'Dictionaries', 'Death', 'Drinks', 'Differences', 'Descendants', 'Doves', 'Divination', 'Denial and Deprivation', 'Domesticity' and 'December'.