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Brigadier General Jack O'Neill and Lieutenant Colonel Samantha Carter from Stargate SG-1 always had an uneasy relationship until it came out in Season 4 that they had "feelings" for one another. Seven years later, Jack had left the Stargate Program for Washington and Sam was in charge of Earth's Base in the Pegasus Galaxy.
So are they together? Or is everything still in the room?
Whatever happens, they were once the best.