Don't know about anyone else, but I always found the whole idea of Parallel Time fascinating! And should anyone be interested here is an interesting and entertaining documentary on the scientific basis for the idea:
http://www.youtube.com/watch?v=ZnnA3sgMXCIAnyway, I take part in a group investigating the idea the Wold Newton Universe--a premise that many fictional stories are in fact historical accounts (with varying degrees of accuracy) of a parallel world to our own. In this place, Sherlock Holmes solved a mystery involving Tarzan's uncle in "The Adventure of the Priory School" while an associate of Zorro was bitten by a vampire and came to be known (eventually) as Vampirella, where James Bond and Hercule Poirot as well as U.N.C.L.E. may have all crossed swords at one point or another with Fu Manchu.
DS is part of this, and some of us recently began to investigate how many times we may have encountered Parallel Time in other works, such as...
The television show
Fringe involves a parallel world, one with somewhat more advanced technology but where 9/11 destroyed the White House, Nixon's face is on the half-dollar coin, comic book heroes include the Red Arrow and Red Lantern, etc.
Another show,
Doctor Who, encountered a parallel time very much like that in
Fringe--one where Britain is a republic and airships are a popular form of travel.
Both are places were terrible things have happened, resulting in more militaristic governments that may have eventually given rise to the "Mirror Universe" in
Star Trek.
Plus maybe the alternate
Friends where Monica never lost all that weight, Joey became a soap star, Ross stayed married, Phoebe became a stock broker, etc. And the world where
Buffy the Vampire Slayer never came to Sunnydale.
Just something fun to think about!
Just as I've always wondered if PT Collinwood were rebuilt, and might the room allow some later member of the Collins family to meet Quentin and Maggie's children?