Chris Ryan, a former SAS trooper created this series and starred as Blue Troop's Johnny Bell.
Ross Kemp jumped ship from the BBC to ITV thanks to an £800,000 contract, only for the channel to realize that they didn't have anything for him to star in, resulting in Kemp being shoehorned into this series so that the executives who made the deal could justify the cost of hiring the actor. Originally the series was meant to focus on Jamie Dow and how the rookie would grow into becoming a seasoned SAS trooper but after Kemp was cast as Henry 'Henno' Garvie those plans were changed.
Pete twamley is a corporal and is referred to as sergeant in s2 episode 3 by his captain
This series killed Ross Kemp's career as an actor and he had to reinvent himself as an investigative journalist in order to keep working. Although he later went on to host Bridge of Lies (2022) in Spring 2022.
The third series premiere killed off most of the cast and a more politically correct one was brought in (including a woman), with plots now focusing more on over-the-top action rather than the tension and suspense that can occur during high stakes operations.