Stargate Atlantis (2004)

S5E11 The Lost Tribe (2)

Dr. Rodney McKay and Dr. Daniel Jackson find themselves captive at the hands of the Vanir, where they uncover shocking truths about their identities. Concurrently, "Todd" and his Wraith seize control of the Daedalus, intent on locating and annihilating those responsible for activating the Attero device. The Travelers arrive, prompting Lt. Colonel John Sheppard to assist them in reaching the planet before "Todd" can unearth the device's location. This mission may require a dire sacrifice, putting McKay and Jackson's lives on the line.