Charles Grant of Season 4
Don't want to get into the whole time-warp continuum thingy since it tends to get confusing and contradictory. But I was wondering since Grant, an extremely important physicist of his time, was teleported to the future, then the Grant in the past would've ceased to exist and all of his works (mostly theoretical physics), including the Einstein-Grant bridge, also never existed. Wouldn't that have a world-wide major impact to the future, but as Henry stated, the changes are mostly affecting around Eureka. Just wanted others' opinion on this.
(Yes, I know it's a sci-fi tv show and anything is possible, even things that don't make sense)