Karl discusses what his doppelganger would be like. Ricky gives Karl a riddle. Karl and Stephen say what they do not like about Ricky's cat. Stephen discusses his holiday in Rio, where he went for Carnival.

The trio discuss animals and diseases; evolution; a fly that is supposedly a pet; Karl's diary.

Ricky gives Karl some animal facts. Karl ponders the question of whether you control your brain, or your brain controls you. From Karl's diary we investigate the curious case of the invisible Chinese man, why blind people have affairs, the feasibility and usefulness of putting a mirror on the Moon, and birthdays.

Karl shares his thoughts on why insects are so deserving of his attention. Karl talks about his disappointment when learning about a killer octopus; what he would change in crabs; more stuff about insects. Karl's diary is also mostly about insects.

Karl talks about having been rushed to hospital. He says that kidney stones were found and he had a catheter put into his penis. Karl ponders a phenomenon; Karl's diary; and more.

Karl ponders height extremes when he learns that one of his new fans is actor Warwick Davis. Stephen talks about a night when he and his friends visited a nightclub in London. The bouncer refused them entry due to them not having any girls with them. Karl's diary is about his hospital visit for his kidney and a TV documentary in which he believes a monkey acted as a toll taker on a bridge.

Karl makes several predictions about humanity's distant future, including his belief that everyone will be ugly, that we will be physically weaker, the little finger will cease to exist, trousers will cease to be produced and we will blend all of our food. Stephen says that if he knew it were the last day of Earth's existence, he would smash up a bar and kill a person. Karl says that he would kick a duck up the arse.

Ricky talks about undiscovered species. He talks about a drawing he did when he was in his early teens of an animal which consisted of a lion's head, a gorilla's arms, the body of a rhinoceros, the tail of a scorpion and the legs of a cheetah. Karl says that his design for an animal would consist of the head of an owl, an armadillo's body on a slug base and with peacock feathers. Karl talks about having met a man who had drawn a design for a car which enabled defecating while driving. Karl says his father had a friend who kept a monkey as his pet.

Karl discusses his childhood memories of having thousands of Tic Tacs in his house, given to his father by a friend. Karl tells of his visit to a "professional leg rubber", who tells Karl ridiculous things and charges £48 for half an hour. Karl talks about his visit to a Harley Street doctor's surgery for a medical. In the waiting room, he was surprised to find Boyz among the magazines. He looked through it, thinking it might enlighten him about the appeal of homosexual sex.

Karl talks about the brain having two sides and "sensing" when trouble is near. He recounts having eaten a beetle, having been lost in London and having talked to a ghost in Cornwall. Karl then reveals that the ghost encounter was something his mother told him, rather than a personal memory of his. He talks about his aunt not wanting double glazing. He says that if he was a manager, he would sack staff who were absent due to thick snow impeding their route to work. Karl's Diary includes his belief that Martians are more advanced than us because their days are longer, allowing for greater productivity. Another of his diary entries is about a pub whose new owners have been criticised for barring a regular customer, who is a horse.

The trio discuss art, including Marcel Duchamp's Fountain and Damien Hirst's The Physical Impossibility of Death in the Mind of Someone Living as well as sculptures. Karl talks about a tricycle-riding fat woman nicknamed Miss Piggy who lived on the same estate as him.Ricky says that adaptations of literature and film can be improved by featuring the Muppets. Karl says that his favourite films are The Elephant Man, Kes and Mission: Impossible 2. Karl talks about his fondness of whistling, and Ricky says that he finds it annoying.

Ricky asks Karl if he would give up his real life to live in a virtual reality isolation tank. Karl discusses his thoughts about problems, holidays and happiness. Whilst recounting having met an older man on holiday, Karl finally laughs.