Gamekeeper

S2 E4: O'Neill and the SG-1 team travel to P7J989 where they discover a beautiful garden and a dome full of strange metallic chambers each containing an unconscious person. As the team inspects the chambers they are trapped and knocked unconscious. They awaken to find they are reliving pivotal moments in their lives in the hope of changing the outcome. Teal'c joins O'Neill on a battlefield where the Colonel lost a patrol; Daniel and Carter witness the death of his parents in a freak accident. A shadowy figure called The Keeper (Dwight Schultz) steps forward and explains that they are part of a game that feeds memories into a virtual reality he has created for the amusement and edification of 'his residents' in the metallic chambers. He explains that they are there because he says the planet has been rendered uninhabitable because of the pollution on the planet. But The Keeper is lying when the SG-1 team threatens to reveal his deceit to the others he admits defeat. Or does he?