Stargate SG1 - The Refugees Have Disappeared (Season 1 Ep. 16)

From The Episode "Enigma"
Description From IMDB - On their first visit to a new planet, SG-1 finds it subject to totally destructive volcanic activity and saves ten natives, the Tollan, a far more technologically advanced society. Their leader Omoc isn't grateful, nor interested in such a primitive race as the earthlings or any of the 'even more primitive' planets which are prepared to host them. Only one Tollan, Narim, shows an active interest in life on earth, especially in captain Samantha Carter and the cat Schrodinger she gives him, explaining his planet was destroyed after the Tolan supplied an unlimited energy source to a primitive neighboring planet which abused it for a cataclysmic weapon. Meanwhile the White House authorized NID colonel Mayborn to take charge over the Tollan for military purposes, exactly Omoc's nightmare..
The rights to Stargate SG-1 are held by MGM