Stargate Atlantis (2004)

S3E19 Vengeance

The Atlantis team embarks on a mission to uncover the mystery behind the vanishing of one of their comrades. Their search leads them to a familiar foe who is plotting to create a formidable army of monstrous beings. As they delve deeper into the threat, the team must confront not only the danger posed by these creatures but also the sinister mastermind behind their creation.