Season 6 Episode 21 - Prophecy

SG-1 arrive on P4S-237, a planet where the locals are under the tyranny of Lord Maat and his master Ba'al, and the villagers believe SG-1 will fulfill a thousand-year old prophecy to free them. Jonas passes out - he starts having brief flashes of the future. Jonas suspects it's the results of Nirrti's experiments on him (in "Metamorphosis"), while Dr. Fraiser has detected a non-cancerous tumor that is growing fast. Jonas tries to alter a future where he sees Sam get wounded on P4S-237, but when she stays behind she gets injured in a base accident. One of the locals sells out O'Neill and Teal'c and plans to get the iris codes from them, while Jonas has a vision of Mot coming through the iris and wiping out the base. Mot secretly has them released to ambush them when they use the iris code. Meditating, Jonas determines O'Neill will be ambushed when he activates the code to come back, before he passes out himself. As Jonas undergoes successful surgery he warns Sam who warns the others, while the locals turns against Mot and kill him.