doppelgangers in film and tv!

So I'm organising some files and such to get a vid project ticking away in the background for later this summer, and I am in search of source! Specifically, I am thinking of making a multi-fandom vid about doppelgangers and clones etc for my 'mirrors and doubles' kink_bingo square. Originally I was going to keep it in Doctor Who, but really, this is one of my faaaaavourite tropes, so why stick to just one show?

Source already on my radar:

- Battlestar Galactica
- Buffy
- Doctor Who
- Farscape
- Fringe
- Sarah Connor Chronicles
- Stargate Atlantis
- The Vampire Diaries

Star Trek too, but I can only think of the Mirror!verse episodes in TOS and DS9 and am probably missing other examples.

So! I am looking for footage that has doppelgangers/clones/evil twins/parallel universe selves/robot copies/holographic projects/any other variants I can't think of interacting with their original selves. Any show/film, any genre, though I will probably lean more towards more fannish media. Bonus points for canonical instances of characters hitting on themselves (thank you in advance for your services to this cause, mirrorverse!Kira!).