David Mitchell is joined by Lou Sanders, Ria Lina, Milton Jones and Chris McCausland as they lie on the subjects of flowers, wood, underground and goldfish.

The Truths

Chris McCausland - Goldfish

- Goldfish were once given as romantic presents from husbands to wives, in a practice from the early 17th century. Found by Lou.

- Goldfish are prone to depression. Successfully smuggled.

- Film producer Samuel Goldwyn also went under the name "Samuel Goldfish". Successfully smuggled.

- Goldfish are worse than humans at hearing. Successfully smuggled.

- John Prescott bought a goldfish for Tony Blair just to cheer him up. Successfully smuggled.

Lou Sanders - Flowers

- Nintendo bred a flower called the "Pikmin", to promote the game Pikmin Bloom. Found by Ria.

- 15% of American women send flowers to themselves on Valentine's Day. Found by Chris.

- Flowers grow quicker when spoken to in a Geordie accent. Found by Chris.

- Humans share 85% of their DNA with daffodils. Found by Milton.

- The naked man orchid gets its name because each petal resembles a naked man, complete with a small penis. Successfully smuggled.

Ria Lina - Wood

- In 2018, the National Toy Hall of Fame in New York gave the "Oldest Toy" award to the stick. Found by Chris.

- The San Francisco Fire Department uses wooden ladders, because they don't conduct electricity from overhanging cables. Found by Lou.

- A woodpecker's tongue wraps around its brain, protecting the brain during high-speed pecking. Found by Lou.

- Woodlice can change sex from male to female if they catch a particular form of parasite. Found by Chris.

- Swedish scientists have developed a transparent wood which can be used to make windows. Successfully smuggled.

Milton Jones - Underground

- The original plans for the London Underground included terminating in Paris. Found by Ria.

- There is a group of pigeons that regularly travel on the London Underground from Hammersmith to Ladbroke Grove. Found by Ria.

- There are hundreds of thousand-year-old tunnel systems in Bavaria, and no-one knows who built them or why. Found by Ria.

- Only one pirate, William Kidd, is known to have buried any treasure underground. Successfully smuggled.

- The largest badger set ever discovered had 50 underground chambers, 178 entrances and 879m of tunnel. Successfully smuggled.

Scores

- Lou Sanders, Milton Jones and Chris McCausland: -1 point
- Ria Lina: -3 points