Episode 7 of "Stargate Atlantis"
s01e07 Poisoning the Well
Title: Poisoning the Well
Original Air Date: 08/20/2004 on Sci-Fi Channel
Director: Brad Turner
Writer: Damian Kindler
Guest Stars: Neil Maffin (Merell), Darren Hird (Dying Patient), Allison Hossack (Perna), Edmond Wong (Technician), James Lafazanos (Wraith/Steve)
Plot Outline:
The team investigates a drug being developed on another world, that has the potential to repel the Wraith's feeding on humans.