The first outlines of an old memory emerged in Sirius's mind. Like breath misting on a cold glass. He remembered the strange dream he had, before he woke up in the mud, straight from duelling Bellatrix and fighting in the Death Room, of a place he didn't know but he remembered, he remembered a pub, and a storm in the 1960s, coming to see Alphard when he was about seven, and of some local muggles- what had that man said? Something about a place where the spirit world comes close. How Skye was a thin place. He just never expected to see the Isles again, after Azkaban, never mind his Uncle Alphard or his little brother Regulus... But that's the Other Side, so they say. It was the year 1966 and the Wizarding World he knew was gone. Some things seemed the same- like James and the Potters, they seemed normal, as normal as a six year old James Potter could have really been. But things were different. It was all different, and it terrified him- his mother was dead already, for one. And also, if Sirius could just stop forgetting about the other world and the way things went that time, that'd be just great. (Dimension-Travel AU)