Oh dear, I can see a ficlet coming on (I skipped SGA because the premise looked ludicrous):

Sharon wakes up. "Where am I?"
Dr. McKay: "You're onboard Atlantis. You were a Cylon in another universe, but we gave you a drug that stops that."
Sharon: "You gave me a drug from another universe?"
Dr. McKay: "We have sufficiently dense technobabble to allow us to do that."
Sharon: "What's technobabble?"