: The team discovers that the Wraith Dart that previously "self-destructed" over the city actually beamed down a pilot. This lone Wraith has been sabotaging Atlantis's systems and is responsible for Teyla’s recent disturbing visions.
: Tensions peak as Sergeant Bates accuses Teyla of being a security risk due to her mental connection to the Wraith. When Bates is found brutally attacked, suspicion initially falls on Teyla before the hidden Wraith pilot is revealed. Strategic Dilemmas [S1E19] The Siege: Part 1
"Stargate: Atlantis" The Siege: Part 1 (TV Episode 2005) - IMDb : The team discovers that the Wraith Dart
: To buy the city more time, Dr. Peter Grodin remains on the failing satellite to ensure it fires. He is killed when the remaining two Hive ships retaliate and obliterate the platform. [S1E19] The Siege: Part 1