Stargate Atlantis (2004)

S5E15 Remnants

During an assessment by the International Oversight Advisory, Richard Woolsey encounters a stunning new scientist at Atlantis, who hides her true identity. Meanwhile, Lt. Colonel John Sheppard finds himself in a dire situation as he is captured and subjected to brutal interrogation by an old nemesis he believed he had defeated years earlier: the formidable Genii Commander Acastus Kolya, who is determined to exact revenge.