Great, except that the rocks chained to Teal'c's feet also cause his death. Luckily a kindly towns-dude brings the guys their weapons. Eventually they kill the Unas, his snake and the religious leader. Then they take his ring with them back to Earth. Overall, this was an average episode.
Several problems linger, though, upon reflection.
The Unas, for example, is mentioned as being very hard to kill but three shots from Teal'c's staff weapon put the guy down for good. When Teal'c drowns, the rest of his team pretty much writes him off and vows not to let him pass in vain. Not only is the guy a regular but we all know he's got this all-powerful snake in his stomach which pretty much protects him from any kind of real harm. I mean, these clods haven't even invented the toothbrush yet. Wake up and smell the Crest, people.