Saison 2

Topics include Karl description of his recent pitch to a movie studio and, from Karl's diary, reasons why he wouldn't like to travel to Australia, the story of the last time he went camping and a recent visit to his girlfriend's parents.

A listener's e-mail asks what Karl would do with his doppelganger; Ricky gives Karl a logic riddle to solve; entries from Karl's diary; Stephen discusses his recent trip to Rio de Janeiro.

Ricky reads little-known facts to Karl; Karl recounts medical news; entries from Karl's diary including his observations on the Congo, mishaps when ordering takeout and his visit to a gadget shop.

Topics include interesting facts about animals; the brain’s role in everyday activities; and entries from Karl’s diary about mimes, a Chinese man who can’t be photographed and the wisdom of celebrating birthdays.

Topics include Karl's encounters with insects; optimal animal sizes; "Inside the Actors Studio"; and entries from Karl's diary about a new sea creature and a poem about moths.

Topics include Karl's bout with kidney stones; living things that resemble other things; Noah's Ark; romantic advice from Karl; and an entry from Karl's diary about a trip to the Cotswolds with his girlfriend.

Karl considers the height of actor Warwick Davis; Stephen discusses a night out; entries from Karl's diary.

Topics include Karl's thoughts on academics' predictions for the future; and what the guys would do on the day the world ended.

Topics include the value of discovering new species; Ricky's idea for a future car; Karl's speculation about alien involvement in the invention of the computer chip; and a documentary about a pregnant man.

Topics include Karl's opinion of a science report about blind mice that can see; his visit to a "professional leg rubber"; and his recollection of the time his father scored a huge quantity of a popular candy.

Topics include the two sides of the brain and ESP; Karl's childhood encounter with a ghost named Mrs. Battersby; and an entry from Karl's diary about his mother's request to find a UFO magazine.

Topics include art; and suggested adaptations of literature and film featuring the Muppets.

Topics for the second-season finale include virtual reality, happiness and Karl's wish for the British TV show "Jim'll Fix It."