By Alex marsh
Since the 1800's, the time agency has kept a peaceful on earth with minimal alien activity affecting the planet. In 1920, team 21 was set up to control alien migrants and technology coming in to earths underground city of sierra IV but in 1962, A Stargate fell to earth and landed in Scotland and activated sending 10,000 Jaffa soldiers into mainland Britain.
team 21 stopped the Jaffa but at the cost of several villages along the Scotland-England border (Hadrian wall), the time agency realised a team in England would be valuable. Paul Jackson and Ryan Helsing (team 21)