Episode 1, Series 1, BBC 2 http://www.bbc.co.uk/iplayer/episode/b08f00s0/sas-rogue-warriors-series-1-episode-1 epistemology noun PHILOSOPHY the theory of knowledge, especially with regard to its methods, validity, and scope, and the distinction between justified belief and opinion. I recently reviewed a Channel 5 series, Secrets of the SAS: In Their Own Words . Other programmes have SAS tags in their title, or synonyms such as Special Forces...