The Other Side (S04E02)

Stargate Command is contacted by Alar, a representative of the planet Euronda. His people are under attack and in need of help. Gen. Hammond sends SG-1 on a humanitarian mission to deliver food and medical supplies. The team arrives to find a civilization devastated by war — and a leader desperate to make a deal. In exchange for the heavy water Euronda needs to sustain its defensive fields, Alar is prepared to offer advanced Eurondan technology to Earth. Col. Jack O'Neill quickly agrees to the trade. Dr. Daniel Jackson, however, is suspicious that the Eurondans have not been completely honest about their agenda, and he sets out to discover their true motives. (Metro-Goldwyn-Mayer (MGM))