Billy Billingham (Author) Billy Billingham spent 17 years in the SAS. He was responsible for planning and executing strategic operations and training at the highest level in locations including Iraq, Afghanistan, South America and Africa, and has led countless hostage rescues. He later became a bodyguard to A list celebrities such as Brad Pitt, Sir Michael Caine, and Tom Cruise. Since 2015, Billy has been one of the lead presenters on the popular Channel Four series SAS: Who Dares Wins. Of the lead line-up, he is the only one with a genuine SAS career. Call toKill is Billy’s debut novel and the first in the Matt Mason series.