Jimmy Carr hosts the comedy words-and-numbers quiz, with Jon Richardson and Roisin Conaty taking on new team captain Rob Beckett and Kiell Smith-Bynoe. Countdown regulars Rachel Riley and Susie Dent are on hand to adjudicate, with Susie joined by Lou Wall in Dictionary Corner.
| Name | Type | Role | |
|---|---|---|---|
| Rob Beckett | Guest Star | Captain | |
| Kiell Smith-Bynoe | Guest Star | Panellist | |
| Lou Wall | Guest Star | Dictionary Corner | |
| Jon Richardson | Guest Star | Captain | |
| Sam Nicoresti | Guest Star | ||
| Roisin Conaty | Guest Star | Panellist |