is the season two premiere of the military science fiction series Stargate Atlantis , originally airing on July 15, 2005. The episode concludes a high-stakes three-part arc where the Atlantis expedition faces an overwhelming invasion by the Wraith. Key Plot Summary
"The Siege: Part 3" was a critical and commercial success for the Sci-Fi Channel, achieving high Nielsen ratings during its initial run. It is often cited by fans as one of the strongest season openers in the franchise due to its mix of large-scale space battles and significant character shifts. AI responses may include mistakes. Learn more
: Paul McGillion (Dr. Carson Beckett) and Mitch Pileggi (Colonel Steven Caldwell) join the recurring or main cast.
: While the immediate threat is neutralized, long-range sensors detect 12 more Hive ships inbound.
