“Entity” is episode twenty of season four of Stargate SG-1.
The SGC is opening a gate to an address that was obtained from the repository of the Ancients. They send a MALP through, which suddenly starts flying. And they don’t have that ability. Something is also broadcast back to the SGC, which overloads the system. The systems are trashed and Carter gets a burn.
The energy broadcast back to the SGC through the gate via the MALP takes over the base’s computers, and starts learning about Earth. An attempt to purge the base’s computers fails, and then it starts to take over Carter.
The entity certainly isn’t giving the impression of being benign. Although it would be an interesting change if it is.
Much of the episode involves Carter staring at people whilst not saying anything. Which is not exactly stunning to watch.