which episode do the aschen appear in
KEY EPISODES. 2010 - In the near future, Earth has allied with the Aschen, who helped them defeat the Goa'uld. But the Aschen have less than admirable purposes, plotting to reduce the birth rate by over 90 percent. 2001 - Though the future SG-1 sent a message back in time to avoid first contact with the Aschen, the event happens less than one year later. But SG-1 again learns the Aschen's secret, and escape the alliance.