Ruth Jones, Heston Blumenthal and Paddy McGuinness demonstrate their brain power in a bid to secure a place in the grand final and quip their way to the illustrious top spot on the series leader board.
| Name | Type | Role | |
|---|---|---|---|
| Ruth Jones | Guest Star | ||
| Heston Blumenthal | Guest Star | ||
| Paddy McGuinness | Guest Star |