Episode 16 of "Stargate Atlantis"
s01e16 The Brotherhood
Title: The Brotherhood
Original Air Date: 02/25/2005 on Sci-Fi Channel
Director: Martin Wood
Writer: Martin Gero
Guest Stars: John Tierney (Alstrum), Laura Mennell (Sanir), Simon Longmore (Tathal), Paul McGillion (Dr. Beckett), Grahame Andrews (Porta), Robert Davi (Commander Acastus Kolya), Jana Mitsoula (Allina)
Plot Outline:
The planet Dagan may be home to a vitally important zero-point module, capable of restoring Atlantis' shield and protect the city from the Wraith, but a mysterious 'Brotherhood' on the planet - and knowledge of the Genii - suggest that the planet may not be what it seems.