Jimmy Carr hosts the words and numbers game show mash-up, with Countdown regulars Rachel Riley and Susie Dent. Roisin Conaty and Joe Wilkinson play against Jon Richardson and Nabil Abdulrashid. David O'Doherty is in Dictionary Corner.
| Name | Type | Role | |
|---|---|---|---|
| Roisin Conaty | Guest Star | ||
| Joe Wilkinson | Guest Star | ||
| Nabil Abdulrashid | Guest Star | ||
| David O'Doherty | Guest Star | Dictionary Corner |