Updated: 12:26 ET, May 23 2021 JASON Fox is best known for hosting Channel 4's SAS: Who Dares Wins. Here's all the details on the former Special Forces agent as the 2021 series gets underway. 3 Who is Jason Fox? He joined the Royal Marines at 16 and served for 20 years. Fox acted as a counter terrorism and demolition expert in the Special Forces, responsible for planning and leading operations. He was also a combat swimmer and was involved in many counter narcotic missions. One of his biggest tasks involved rescuing a civilian from 400 insurgents in Afghanistan where he also served as a dog-handler. 3 What TV shows has Jason Fox appeared on?