[s1e12] The Defiant One -

: This is the first time McKay refers to Sheppard as "Captain Kirk," a joke that becomes a series staple.

: The Ancient satellite discovered is roughly the size of a Goa'uld Mother Ship. Main Cast Joe Flanigan Major John Sheppard David Hewlett Dr. Rodney McKay Christopher Heyerdahl The Wraith Survivor Richard Ian Cox Dr. Brendan Gall Boyd Banks Dr. Abrams

: This episode is noted for Dr. McKay's growth; he chooses to join the fight alongside Sheppard rather than staying in safety.

"Stargate: Atlantis" The Defiant One (TV Episode 2004) - IMDb

is the 12th episode of the first season of Stargate Atlantis . In this episode, a mission to investigate an ancient weapons platform turns into a desperate survival situation against a long-dormant enemy. Plot Summary

: The planet features yellow, firefly-like energy beings similar to those seen in the Stargate SG-1 episode "Prodigy".