Gentleman Jack is a historical drama television series created by Sally Wainwright for BBC One and HBO. Set in the 1830s in Yorkshire, it stars Suranne Jones as landowner and industrialist Anne Lister, and Sophie Rundle as landowner Ann Walker. The series is based on Lister's collected diaries—which run to an estimated 5 million words with about a sixth in secret code,—documenting a lifetime of lesbian relationships. Helena Whitbread began decoding and transcribing the diaries in the 1980s. Other transcribers have carried on the work. The research carried out for Wainwright’s Gentleman Jack amounts to hundreds of thousands of words of new transcription of the diary.

The series premiered on 22 April 2019 in the United States, and on 19 May 2019 in the United Kingdom. On 23 May 2019, It was renewed for a second series, which was shown on BBC One from 10 April to 29 May 2022 and on HBO from 25 April to 13 June 2022. In July 2022, co-production company HBO said it would not proceed with a third series. In July 2022, the BBC announced that they wanted to continue with the programme, but they need to find a production partner to replace HBO.