List of 8 Out of 10 Cats Does Countdown episodes

8 Out of 10 Cats Does Countdown is a British comedy panel show hosted by Jimmy Carr. It is a crossover of 8 Out of 10 Cats and game show Countdown. The show follows the format of Countdown, but with hosts and contestants from 8 Out of 10 Cats, and an emphasis on the humour seen on 8 Out of 10 Cats. All episodes are approximately 45 minutes long, and usually featured team captains Sean Lock and Jon Richardson; after Lock's death in 2021 his team has been led by a rotating series of guest captains while Richardson continues to be a regular captain (except when scheduling conflicts prevent him from appearing).

Legend

 * – indicates a regular episode.
 * – indicates a Christmas themed episode.
 * – indicates a highlights edition.
 * Other colours indicate other themed episodes.
 * TC – a guest team captain sitting in for Sean or Jon

Series 11 (2016)
Lock and Richardson never appeared together in this series.

Series 20 (2020)
This series is composed of unaired episodes as a result of the COVID-19 pandemic. The first two episodes were recorded in late 2019 to accommodate Rachel Riley's maternity leave, made obvious by the fact she still appears 8-months pregnant in these episodes; the third episode was originally filmed in early 2019 as references were made to Richard Ayoade's role in the "recent" film The Lego Movie 2: The Second Part; and the fourth and fifth episodes were Best Bits specials that were originally assembled in 2018. The Christmas Special was also filmed in 2019, prior to Riley's pregnancy.

Series 21 (2021)
The last series broadcast prior to Sean Lock's death in 2021. The first three episodes were shot in 2019.

Episodes yet to air in UK
The following episodes have been shown overseas, but have yet to premiere in the UK. International broadcast of the show refers to a different series numbering in some locations, and consequently these are listed as part of an international Series 15. The episodes broadcast were filmed in 2022.