Ep 20. Entity

SG-1 returns from a mission with a strange energy signature that follows them back through the Stargate. The team thinks it might be an enemy transmission, so they get General Hammond to give the go-ahead to activate the iris in case the energy being is hostile. Carter figures out that it’s some sort of technoform that’s made of pure energy and it reacts when they try to communicate with it. The team decides to keep a close eye on the energy being and try to discern its intentions while keeping the SGC locked down for fear of it being a threat.

As they examine the entity, they discover that it can copy itself onto a computer and manipulate electronics. This leads to the possibility of the entity being able to gain control of Earth’s entire defense network and potentially launch a nuclear missile. Meanwhile, Daniel tries to study the entity’s language patterns to figure out if it’s communicating with them. He learns that the being has a complex concept of space and has traveled through the universe for thousands of years.

The situation worsens when the entity begins to attack the SGC’s computer systems and the team is forced to evacuate the base. The only way to defeat the entity is to destroy every computer it has copied itself onto, but it’s unclear if this will actually kill the entity or just disperse it. Eventually, the team realizes that there’s no other option but to destroy all the computers, and in a tense stand-off, they do exactly that. The entity disperses, but it’s still unclear if it’s gone for good or if it’s just biding its time to try again later.

Overall, “Entity” is a thrilling episode that highlights the dangers of contact with advanced technology and alien beings. The episode builds suspense well as the team struggles to understand the entity and its motivations. Additionally, it’s an interesting commentary on the dangers of artificial intelligence and the potential perils of technology. The episode also delves into the series’ larger mythology, with references to the ongoing Goa’uld threat and the continuing search for the lost city of Atlantis. It’s a must-watch episode for fans of Stargate SG-1 and science fiction in general.