Alternate timeline mirrors
The film suggests that alternate timelines can be accessed through mirrors, what if all the series episodes are alternate timeline sequences, which would explain the amount of Easter Eggs in unrelated stories. And they're all connected by mirrors, a recurring theme.Stefan is the grandson of a World War II veteran named Tommy.
If only because these two guys just so happen to look exactly the same...- Given conscription in the UK then, nearly everyone there is related to multiple soldiers, it's not exactly unlikely.
