The final episode in the current series sees John Barrowman, JLS and Alesha Dixon join Chris to flaunt their general knowledge with the aim of becoming series champion. There are questions from Britney Spears and Jeremy Clarkson with a live maths song from JLS.
| Name | Type | Role | |
|---|---|---|---|
| John Barrowman | Guest Star | ||
| JLS | Guest Star | ||
| Alesha Dixon | Guest Star |