History
Susie Griswald and her family were visiting the Tower of London on a vacation when they were caught in one of Widget's dimensional portals. The Griswalds and their Beefeater tour guide were transported to Earth-99476, while their alternate dimensional counterparts arrived on Earth-616 in their place.[1]
Eventually, the Excalibur of Earth-99746 came to 616 and retrieved their citizens in exchange for the Griswalds of that Earth.[2]