The Curse (S04E13)

When Dr. Daniel Jackson's old archeology professor, Dr. Jordan, dies in a mysterious lab explosion, Daniel pays a return visit to his old academic stomping grounds. As Daniel reacquaints himself with his former colleagues — including his former girlfriend, Sarah Gardner, Jordan's research assistant — he begins to suspect Jordan's death might not have been an accident. Daniel discovers that one of the items the professor was studying, an ancient Egyptian jar, contains a perfectly preserved Goa'uld symbiote. Apparently, a crack in the vessel compromised the sedative solution within, killing the creature. But further investigation reveals that a second jar might have existed. With a Goa'uld apparently stalking the campus and the local community abuzz with talk of an ancient curse, Daniel must unravel the mystery before it's too late. (Metro-Goldwyn-Mayer (MGM))