This is from the Season 4 SG-1's point of view. You'll be less confused as I continue to post...I promise!
"Unscheduled incoming wormhole!" Sgt. Walter Davis announced.
General Hammond and SG-1 hurried to the Control Room. "Are we receiving an iris code?"
Walter looked at the screen. "Yes, sir."
They all waited for the announcement of the team in trouble when the Sergeant took a deep breath. "It's...SG-1."
Jack's eyes widened. "Um...hello!"
"Open the iris!" General Hammond said, urgently.
"Uh, sir, is that really such a good idea?" Sam asked.
"Do you have any other suggestions?"
"Um...no." She said with a reluctant nod.
She rushed into the Gate Room behind General Hammond, Colonel O'Neill, Daniel and Teal'c. The sight that met their eyes was surprising to all of them. Daniel Jackson, Teal'c, and another airman came through the Gate, shortly followed by Samantha Carter.
Daniel looked at the SG-1 that was staring at him. "Uh, General Hammond. Jack. What are you doing here?"
Sam looked at him. "We could say the same thing to you. Who are you?"
"We're from the future." Colonel Carter explained.
Sam raised her eyebrow. "Oh, really?"
"Uh, Sam...that technology we got from the Asgard to predict solar flares...that was supposed to prevent this from happening." Daniel said, his eyebrows lifted as he tried to whisper his point to his friend.
Carter walked down the ramp, her hand extended. "My name is Lt. Colonel Samantha Carter."
"Uh, what about the Grandfather paradox." Sam said, trying not to be impressed by her 'future' rank. "If you are anything like me, you would know..."
"I've changed." She said, curtly.
Jack took a deep breath, and eyed Carter with interest. "Oh, yeah...we noticed."
Her look softened as she looked into Jack's face. "I was hoping you'd be here."
"Sam." Her Daniel said, warningly. "We shouldn't be here."
"Daniel."
"You know that just as well as I do." He said, looking at the younger versions of the members of SG-1.
"You don't find it the least bit strange that we're here after we have the technology to make sure it never happens by accident?" She asked.
The Teal'c with hair and not the blond 'mojo' as Jack had dubbed it, stepped forward and outstretched his arm in a traditional Jaffa handshake. "It is good to see you again, old friend."
Jack let his eyes wander from this Teal'c to the Teal'c that he was accustomed to. "Good to...see you too!" He said with a mystified smile.
"Well, SG-1...the future SG-1...please report to the infirmary. We'll debrief later." General Hammond said, motioning them toward the infirmary.
"Don't worry, we know the way." Major Mitchell said, leading the way. Daniel cast a disapproving glance toward Colonel Carter and Teal'c followed, his gaze lingering on O'Neill. Daniel followed next, and Carter turned to General Hammond. "It's good to see you too, sir." She said with a sad smile.