Episode 141 of "Stargate-SG1"
s07e09 Avenger 2.0

While Teal'c and O'Neill are off with some Jaffa and Daniel is helping the natives on a geologically unstable planet, Dr. Jay Felger (from "The Other Guys") has managed to piss off Hammond after blowing the base's power out while testing a new plasma cannon. Felger promises to come up with a new device in 24 hours and comes up with Avenger, a computer virus that can shut down any Stargate in the network. With Carter's backing, Hammond agrees and Felger targets a stargate on a mining world owned by Ba'al. But the virus triggers a network-wide collapse of all the stargates, trapping Daniel in the middle of a flood and Teal'c and O'Neill in a firefight. Ba'al launches a series of attacks on his rival System Lords, taking advantage of the gate shutdowns. Carter and Felger try to upload the original coordinates from the SGC computer but fail, and realize they have to go to the planet where the virus was originally loaded - Ba'al's world. Carter and Felger travel there and realize Ba'al modified the virus and Felger didn't screw things up. Felger works to rewrite Ba'al's rewrite of Avenger and Carter tries to hold off the encroaching Jaffa. Fortunately, O'Neill and Teal'c show up in the nick of time in an Alkesh fighter - Felger is successful and gets to dream of Carter and his assistant Chloe fighting over him in a wrestling contest.