Back To The Future (Part I)
Daniel attends Katherine Langford's funeral. Her niece gives him a pendant that belonged to her aunt, and asks if she can send on a few more bits and pieces. A room full of boxed artifacts turns up at the SGC. Amongst these things Daniel finds a drawing of a picture that no longer exists, it having been destroyed in a museum fire. The picture shows a ZPM.
They know the site where the picture was found. But the site has been scanned for ZPMs. They do know that one was there once, back in 3000BC, but Ra must have taken it with him.
So, they decided to use the time-travelling Puddle Jumper to go back and steal it. All Jack has to do is "think" the right time period, but amazingly (to me at least) this works, and they even arrive with identical outfits to those that the natives wear. Teal'c dresses up as a temple guard and steals the ZPM, and they are on the home run...
At this point I thought that this was a most unlikely story, but I do like time travel and AU stories and it is well worth watching the rest.
When they get back to the Puddle Jumper it has been exposed. If they interact with the Jaffa and kill any, they will change the future so they decide instead to do nothing. They must remain in the past, but they can still send the ZPM to the future, by placing it in an Osiris Jar along with a video recording....
Skip forward to the future... An alternate future where Katherine Langford's father never uncovered a Stargate because Ra took it away with him, Dr. Daniel Jackson's theories are still rubbished and he never translated the hieroglyphics. He teaches English to foreign students but thinks he ought to be doing something more.
Sam Carter checks articles for grammar and factual errors before they are submitted. She wears frumpy clothes and is afraid to confront her boss.
Jack owns a fishing boat called 'Homer' and charges by the hour.
Hammond is still in charge of Cheyenne mountain and Major Davis has a moustache. Rodney McKay is the science researcher at the base. And Kinsey is President.
After watching the video the Air Force recruit Sam and Daniel, but Jack tells them where to go.
Sam and Jack realise that they could change their humdrum lives if they stay and help recreate the Stargate program, but realise that once Daniel gives them the location of the second Gate their usefulness will expire. They try to encourage Jack themselves, but give up when he doesn't believe their far-fetched story.
The Puddle Jumper was found near the Osirus Jar, but it cannot work without Jack. Keying the DHD buttons has no effect it seems, but Sam cross-references the times with seismographic readings from the Antarctic and determines the location of the second Gate.
Once they tell Hammond and the Gate is brought to Cheyenne mountain he tells them that their work is over. They can go home...
But how can our Jack, Daniel and Sam ever get home; now trapped in the past, their futures have been vapourised by something they did that caused a time-shattering chain-reaction. Can they patch it up? And where is a Delorean when you need one?