The cast includes Aneurin Barnard, Alexandra Roach, Phaldut Sharma, Iwan Rheon, Steffan Rhodri and Joanna Page.

In Morriston Hospital in Swansea in 1994, a group of middle-aged Welsh men stepped into the unknown by taking part in the world's first medical trials for the drug that became Viagra.

Executive producers were Nicola Shindler and Davina Earl for Quay Street Productions, Rachel Evans for Boom, Matthew Barry, Russell T Davies and Rebecca Ferguson for the BBC.

[2] In 2023 the cast was revealed to include Phaldut Sharma, Iwan Rheon, Mark Lewis Jones, Steffan Rhodri, Alexandra Roach and Joanna Page.

[7] Writing for The Guardian, Lucy Mangan described the programme as "a masterpiece" and awarded it five stars out of five.