Kleinman: Sir, I have an incoming message from Atlantis
Caldwell: Atlantis, is it replicators?
Kleinman: No sir, it has Sheppards authentication code on it
Caldwell: Open a channel. Colonel, I'd like to believe this is you.
Sheppard: Well it is, authentication code Alpha Delta Charlie Niner Six.
Caldwell: That authentication code is no longer valid Colonel
O'Neill(in a smart alec tone): Hey, Caldwell. General Jack O'Neill here, that valid enough for ya?