The small town at the centre of the drama - where the Howells live & have their offices - is Laugharne, Carmarthen, S Wales, and was the last home of the Welsh poet Dylan Thomas until his death in 1953. The castle features in views from Faith's house and The Boathouse - Thomas' home - can be seen in the background of some shots. Laugharne is pronounced 'Larne'.
Closing song of Keeping Faith's first episode was written and sung (Welsh version sung by Ela Hughes) by Grammy award winning songwriter Amy Wadge; co-writer of global chart-topping song Thinking Out Loud by Ed Sheeran.
On Wednesday, 22nd January 2020, BBC Cymru Wales and S4C jointly announced that the hit crime drama has been commissioned for a third and final series. Filming on series three begins in 2020. The third series is expected to air on S4C in October 2020 and on BBC One Wales in February 2021 and will be available across the UK via the BBC iPlayer.
The role of Delyth Lloyd, the receptionist at the law practice, is played by two different actresses - Suzanne Packer in the English version and Betsan Llwyd in the Welsh version.