Episode 40 of "Stargate-SG1"
s02e18 Serpent's Song
Title: Serpent's Song
Original Air Date: 02/05/1999 on Syndication
Director: Peter DeLuise
Writer: Katharyn Michaelian Powers
Guest Stars: Peter LaCroix (Ashrak), Dan Shea (Sgt. Siler)
Plot Outline:
Pursued by Goa'uld, Apophis, throws himself on the mercy of SG-1. Despite his past evil, SG-1 grant him sanctuary. Apophis, who shows signs of having been tortured, is slowly dying and reveals that he is being pursued by an ancient and powerful Goa'uld named Sokar, the original god of death.