- "This is a Code Three alert. We need zats and TERs in Isolation Room One now."
- ―Sam Carter activating the Code Three.[src]
In 2001, Major Samantha Carter activated it because the Goa'uld Nirrti was inside the base collecting information on Cassandra Fraiser whom as she was trying to produce a "Hok'tar". (SG1: "Rite of Passage")