Vengeance

S3 E19: After helping relocate the Taranans the Atlantis team realizes they haven't heard from the village in an unusually long period of time. Wondering what happened to them Weir (Torri Higgenson) sends Sheppard (Joe Flanigan) and his team to go investigate their village. Once there it appears the Taranans have just abandoned their village until Rodney McKay (David Hewlett) detects life signs well beneath the surface in the remnants of the previous village's underground industrial complex. Searching the dark winding corridors of the abandoned tunnels the team comes upon some sort of cocoon as well as a lab that appears to have been used for Wraith experiments. Discovering the bodies of several Taranans who appeared to have been fed on by the Iratus bug the team has little time to piece the puzzle together before they themselves are attacked by a large insect-like monster. Their weapons are useless against the creature's exoskeleton. Ronon is barely able to fend it off by cutting off one of its arms. Radioing for backup the support team manages to make it through the gate just moments before a wraith dart scoops them up. Back in the tunnels Teyla (Rachel Luttrell) becomes separated from the team and taken prisoner by the scientist who created the beasts Michael (Connor Trinneer). He explains that after being treated as an outcast by his own people unable to live as a wraith or a human he decided to create an army of his own. Using what he learned from Dr. Beckett's retro-virus and through experiments of his own he's been able to build a super bug. Having used the entire Taranan village as food for his experiments he plans to use Teyla to the same end.