"Oh, Dr. Jackson is gonna die when he sees this."
"What, again?"
Cameron Balinsky and Dave Dixon[src]

P3X-666 is a planet in the Milky Way galaxy. When the Tau'ri arrived here for exploration, Ancient ruins were all that remained.


The SGC teams engaging in a fierce gunfight against rival Jaffa troops. From the Season 7 episode, "Heroes Part 2".

The Goa'uld ambushed SG-13 and SG-3 here. SG-1, SG-5 and a medical team were sent to the planet to extract the SG teams, with the SG teams getting into a intense firefight with Jaffa ground troops.

Unfortunately, the battle wasn't without fatalities as Dr. Janet Fraiser, the SGC's Chief Medical Officer died after hit being by a blast from a Goa'uld staff weapon, leaving her SGC colleagues grief-stricken and devastated over her death. It was also on this planet that Colonel Jack O'Neill took a staff weapon blast to the chest but ultimately survived thanks to the Vest insert he was wearing which reduced the fatality of the blast, saving Jack's life. (SG1: "Heroes, Part 1", "Heroes, Part 2")