Episode 63 of "Stargate-SG1"
s03e19 New Ground

Team discovers that a planet on which 2 locals just discovered the stargate that had been burried for thousands of years. When the team goes through the gate, they meet one of the discoverers, Nyan, an archeologist that was looking for ancient villages. Nyan tells them that the planet is devided into 2 religions: the ones that believe that all life began on their planet, and the ones that believe that the first humans had been brought to the planet using a "gateway". Those 2 parties have been at war for decades. Unfortunately the stargate seems to be in territory posessed by the ones that do not believe in the stargate. Meanwhile the second scientist has warned the authorotys and the army comes after the team. Only Teal'c can escape, and he is severely injured. The others get questionned by the army, who thinks they are enemy spies, and don't believe a word of what they say when they explain they came through the stargate. Now it's up to Teal'c to rescue the rest of SG-1, but while trying to escape he has been shot by a native weapon and seems to have lost his eyesight...