A note comes through the Stargate
Hammond: What is it?
O'Neill: You tell me.
Jackson: “Under no circumstances go to P4C-970. Colonel Jack O'Neill.” This looks like your handwriting.
O'Neill: It is my handwriting. And it's my signature.
Fraiser: That looks like blood, sir.
Hammond: I want P4C-970 removed from the dialing computer immediately.
Carter: I wonder why you sent it. I wonder when.