Red Sky

Episode: 5.5

Summary
SG-1 goes to the planet K'Tau, but when the wormhole passes through the K'Tau sun an incident occurs that changes the sun's content and dooms the planet to death. They therefore meet with the Asgard Freyr who is the planet's protector who, together with the Asgard High Council denies them the help they need. This they do because the Protected Planets Treaty does not allow the Asgard to technologically change anything on the planets under their custody.