Was thinking about Five's powers and how they worked in End of Something when he follows Reginald's advice and travels by seconds. I've seen some people refer to this as a new power, where he rewinds time, but I never saw it that way, I just saw it as a short jump and seeing everything go backwards was just a visual choice to illustrate that he was going back in time. After all, in The Day that Wasn't, the same visual idea is used to illustrate the day being undone, with us seeing everything going in reverse up until the point where Five arrives in 2019, having used the suitcase to travel.
But then I thought, if it wasnt a new facet of his power where he rewinds time, if he was just travelling in time, wouldn'the still have gunshot wounds? And then it occurred to me, we refer to Five's power (and similar powers) as time travel, but what if his power isn't so much travelling in time as it is travelling in space while rewinding or fast forwarding time. So, in rewinding time, his wounds from getting shot heal, while he does a spatial jump at the same time, landing just inside the entrance of the barn. It also explains why Five, initially is just running against the flow of time, and the spatial jumps right at the end, because the point at which he jumps is after he reversed time to before they were shot, its the point where his gunshot wounds have been undone. It also fits with the visual of everything rewinding in The Day that Wasn't as well, and, while he travelled with a briefcase in that episode, a different version of Five being the founder of The Commision suggests the technology of the briefcases would work similarly to his powers.
And if you're thinking, okay but at the end of The Day that Wasn't Five got a shrapnel injury and that didn't heal when he travels, he got that shrapnel injury at The Commision HQ, a place that Five says in Kugelblitz exists 'out of time'. So if you can't reverse time in the place that's not in time in the first place, you can't use time rewinding to reverse an injury that occurred outside of time.
(This one made my head hurt a bit)
