"What's the use of an underwater weighing machine?" and "Why did Fosbury flop?" are some of the questions floated by host Stephen Fry as guests Barry Humphries, Bill Bailey, Rich Hall and Alan Davies are pressed on the topic of gravity.
| Name | Type | Role | |
|---|---|---|---|
| Bill Bailey | Guest Star | ||
| Rich Hall | Guest Star | ||
| Barry Humphries | Guest Star |