Stargate Atlantis/Recap/S05 E18 Identity

Tropes:

 * Adventurer Archaeologist: of the evil variety
 * Chronic Backstabbing Disorder
 * Convenient Coma: poor Dr. Zelenka
 * Freaky Friday Flip
 * Not Right in the Bed: One clue to the cast that it's not really Keller is her suggestion to take the jumper out for a sex picnic.
 * The Mirror Shows Your True Self