New series. The reality show in which volunteers are put through SAS recruitment tests returns for a fourth series, hosted by chief instructor Ant Middleton and his directing staff. In 2019, the ministry of defence will be changing their selection criteria for the SAS, allowing women to apply for the first time. To coincide with this, this series will feature male and female candidates competing against one another. The first round of tests comes from the Andes mountains in central Chile, where the recruits must pull fully loaded sledges across high-altitude valleys and plunge into freezing waterfalls.