Season 0 of Only Connect premiered on 2009-12-21.

Season 1 of Only Connect premiered on 2008-09-15.

Season 2 of Only Connect premiered on 2009-07-13.

Season 3 of Only Connect premiered on 2010-04-01.

Season 4 of Only Connect premiered on 2010-09-06.

Season 5 of Only Connect premiered on 2011-08-15.

Season 6 of Only Connect premiered on 2012-08-27.

Season 7 of Only Connect premiered on 2013-05-13.

Season 8 of Only Connect premiered on 2013-09-23.

Season 9 of Only Connect premiered on 2014-04-14.

Season 10 of Only Connect premiered on 2014-09-01.

Season 11 of Only Connect premiered on 2015-07-13.

Season 12 of Only Connect premiered on 2016-07-11.

Season 13 of Only Connect premiered on 2017-07-28.

Season 14 of Only Connect premiered on 2018-10-22.

Season 15 of Only Connect premiered on 2019-09-02.

Season 16 of Only Connect premiered on 2020-09-21.

Season 17 of Only Connect premiered on 2021-07-12.

Season 18 of Only Connect premiered on 2022-08-29.

Series 19

6.3

.

2023

.

28 Episodes

Quiz show in which connections must be made between apparently unconnected things.

Season 20

6.9

.

2024

.

28 Episodes

Season 20 of Only Connect premiered on 2024-08-12.

Season 21

6.7

.

2025

.

26 Episodes

Season 21 of Only Connect premiered on 2025-07-21.