I'm told I have a double, though I have never seen them.
Way back in 2002-3 a friend told me he had seen, several times, an 'older, angrier' version of me walking around his neighbourhood.
Fast-forward 5-6 years and one divorce later, there was indeed an older and if not angrier, certainly grumpier version of me living in that neighbourhood - the genuine article, this time!
A couple of years ago a colleague said she had seen me on her bus in to work one Monday morning, and had been about to nudge me on her way past and say hello, but saw the moody, angry look on this fellows face and impassive look when he looked in her direction and decided it couldn't be me, however much it looked like me.
I had taken that day off to go up to the hospital for an appointment, and it turns out at the time of her sighting I would have been in the waiting room, anxiously awaiting my scan and subsequent 'not quiet all clear, but nothing life-threatening' result.
On my way home about a couple of hours later, I did indeed ride that number of bus back into town so I could make my way back home!
Curious.
It seems that there are also doubles of my parents, and they appear to be a couple, in my adopted home city - they actually live in the town (technically also a city, but meh) of my birth, about 100 miles away.
I've seen dad's 'doppleganger' about half a dozen times over the past decade or so, the first time I very nearly approached with "wtf are you doing here?", but I noticed the minor differences as I drew nearer and decided it wasn't him.
Just last week walking through the city centre I came up behind a couple and found myself thinking 'if I didn't know better I'd think that was my parents! Wait... I wonder..." Sure enough, when they turned to cross the road, it was indeed my fathers double, and a lady who looks remarkably like my mother!
I do hope 'angry me' isn't related to them. Or maybe I do! Conflicted ;D