Yeah James... I think my head might explode if this gets written...
Okay - let's keep this simple [yeah right
]
There's canon Lois and Clark in 1998.
That would make Lois 18[ish] in 1985.
Tempus goes to 1985 and changes something [say she doesn't get into her first choice college or misses her internship interview or something].
So there's now to 1998s.
1998-1: Original canon L/C
1998-2: New L/C based on that change
Tempus switches them so they're in the wrong universe/time line. Canon L/C are in 1998-2, New L/C are in the original canon 1998-1. [Sort of like L/C v. Lane/Kent in ML's No Place Like Home, except they both got switched].
If they go back to 1984, *before* Tempus messed with the time line.
In front of them is a time line 'Y'.
One time line leads to the canon L/C time line 1998-1. The other time line leads to the new time line based on Tempus' change, 1998-2.
They're now in 1984-0 [unchanged from the original because the time line didn't change till 1985].
Which fork in the road does their time machine take when they go forward again?
Does it take them back to 1998-1, their original time line?
Does it take them back to 1998-2, because of the whole nature abhors a vacuum thing and there's already Lois and Clark in 1998-1 [even though it's the *wrong* Lois and Clark - that doesn't matter to time]?
Is that making any sense at all?
Carol [who has a headache...]