In Morriston Hospital in Swansea in 1994 a group of ordinary middle-aged Welsh men stepped into the unknown by taking part in the world's first medical trials for the drug that became Viagra.
| Writing | Matthew Barry | Writer |
| Directing | Ashley Way | Director |
| Production | Karen Lewis | Producer |
| Production | Nicola Shindler | Executive Producer |
| Production | Davina Earl | Executive Producer |
| Production | Russell T Davies | Executive Producer |
| Production | Matthew Barry | Executive Producer |
| Production | Rebecca Ferguson | Executive Producer |
| Production | Nick Andrews | Executive Producer |
| Production | Rachel Evans | Executive Producer |
| Production | Karen Lewis | Executive Producer |
| Production | Ashley Way | Executive Producer |
| Production | Jon Williams | Line Producer |
| Sound | Blair Mowat | Music |
| Editing | John Richards | Editor |
| Production | Rachel Sheridan | Casting Director |
| Production | Amelia Shankland | Production Designer |
| Art | Kim Armitt | Art Direction |
| Art | Muirelle Wilson | Set Decoration |
| Costume & Make-Up | Lucille Acevedo-Jones | Costume Designer |
| Costume & Make-Up | Sarah Astley | Makeup Supervisor |
| Costume & Make-Up | Sarah Astley | Hair Supervisor |
| Costume & Make-Up | Vikki Owen | Makeup & Hair Assistant |
| Costume & Make-Up | Mimi Rhys-Jones | Makeup Trainee |
| Costume & Make-Up | James Spinks | Makeup Designer |
| Costume & Make-Up | James Spinks | Hair Designer |
| Production | Jakub Kyral | Production Secretary |
| Production | Chris Leach | Head of Production |
| Production | Siwan Phillips | Head of Production |
| Directing | Huw Jones | First Assistant Director |
| Directing | Gwawr Keyworth | Second Assistant Director |
| Directing | Elly Meredith | Third Assistant Director |
| Art | Hywel Fanner | Assistant Art Director |
| Art | Sam Filburn | Property Master |
| Art | Ben Livingstone | Graphic Designer |
| Art | Meish Quinn | Standby Art Director |
| Art | Gwion Ynyr Roberts | Set Dresser |
| Sound | Richard Brooks | Sound Recordist |
| Sound | Simon H. Jones | Sound Re-Recording Mixer |
| Sound | Leslie Liu | ADR Mixer |
| Sound | Milos Stojanovic | Dialogue Editor |
| Visual Effects | Marc Turner | Special Effects Supervisor |
| Visual Effects | Lucy Lawson-Duckett | Visual Effects Producer |
| Crew | Jacob Percival | Visual Effects Editor |
| Visual Effects | Jack Rhys Phillips | Visual Effects Supervisor |
| Visual Effects | Peter Rogers | Visual Effects Producer |
| Crew | Tom Tatchell | Compositor |
| Crew | Antony Jenushan Thanarajaratnam | Compositor |
| Crew | Anthony Williams | Compositor |
| Crew | Llyr Williams | Compositor |
| Camera | Paul Edwards | Camera Operator |
| Camera | Paul Edwards | Steadicam Operator |
| Camera | Josh Greenway | Second Assistant Camera |
| Camera | Tom Jackson | Still Photographer |
| Camera | David Key | Second Assistant Camera |
| Camera | Alister Malcolm | Camera Trainee |
| Lighting | Bob Milton | Electrician |
| Camera | Gawain Nash | Best Boy Grip |
| Camera | Nathan O'Kelly | Camera Operator |
| Lighting | Rhiannon Pallister | Electrician |
| Camera | Trevor Speed | Camera Operator |
| Camera | Leighton Spence | Camera Operator |
| Camera | Leighton Spence | Steadicam Operator |
| Crew | Ed Stone | Drone Operator |
| Lighting | Rob White | Gaffer |
| Production | Katie Mozumder | Casting Associate |
| Costume & Make-Up | Fay Bescoby | Costume Standby |
| Costume & Make-Up | Rhiann Houlihan | Principal Costumer |
| Costume & Make-Up | Tess Raggett | Costume Supervisor |
| Production | Emily Brauders | Post Producer |
| Editing | Jonny Garbutt | Digital Intermediate Colorist |
| Editing | Kevin Horsewood | Colorist |
| Editing | Gareth Mabey | Assistant Editor |
| Production | Gareth Roberts | Location Manager |
| Sound | Dora Kmezic | Orchestrator |
| Sound | John McFarlane | Musician |
| Sound | Jack McKenzie | Orchestrator |
| Crew | Steve Wright | Additional Music |
| Writing | Denzel Adebayo | Script Editor |
| Directing | Llinos Wyn Jones | Script Supervisor |
| Writing | Catrin Rowlands | Story Consultant |
| Production | Catrin Brooks | Production Coordinator |
| Production | Fabiana Canale | Production Accountant |
| Crew | Samuel Griffiths | Floor Runner |
| Production | Nyisha Mills | Production Runner |
| Production | Analisa Vailloo | Assistant Accountant |
| Crew | Holly Parker | Choreographer |
| Crew | Adam Bradley | Medical Consultant |
| Camera | Matthew Lepper | First Assistant Camera |
| Camera | Maddie Ferguson | Camera Trainee |
| Camera | Matt Hains | Key Grip |
| Camera | Gareth Robinson | Assistant Grip |
| Production | Jeff Dearing | Unit Manager |
| Production | Morgan Parry | Location Assistant |
| Editing | Mark Bankhead | Online Editor |
| Camera | Adam Etherington | Director of Photography |
