When a film or television series lasts a really long time, it's normal for the same actor to pop up every now and then as completely different characters, because Hollywood is not an inexhaustible well of talent. For example, on Law & Order, an actor can play a scumbag rapist in one episode and a respected prosecutor in another. Nobody bats an eyelash, until you start thinking, "What if those characters were in fact the same person? What if that rapist changed names and went to law school?"
Then you open yourself up to a bunch of mind-blowing thought experiments which totally change the way you look at famous franchises. For example ...
7 Indiana Jones Has Been Murdering A Nazi Clone Of The Same Henchman For Years
"Boy, I hope I'll never have to go through THIS again ..."
What you probably didn't realize is that later on in the movie, he reappears with a shaved head as the giant Nazi mechanic who fights Indy at the airstrip ...
What's German for deja-vu?
And that, despite being reduced to a red cloud of hubris by a propeller, Roach rose from the dead and popped up as a member of the evil Thuggee cult in Indiana Jones And The Temple Of Doom, wherein he played the unnecessarily huge guard overseeing a mine of starving enslaved children.
"Well, he doesn't look very Indian, but racism and makeup can fix that!"
Then he briefly reappeared as a Gestapo agent in Indiana Jones And The Last Crusade, storming baldly through a pile of luggage to intercept Dr. Jones on a zeppelin. Sure, you might write this off as a case of the casting director being forced to use the same guy due to not knowing enough big scary-looking dudes. Or ...
All of Roach's characters were a clone of the same man. Rewatch the trilogy with this in mind, and suddenly a whole awesome yet unspoken subplot appears.
In Raiders, it's mentioned that Hitler has become obsessed with the occult (it's why he wants the Ark of the Covenant, other than the fact that he really needs an accent table for his new office). Now, the Thuggee seem well-versed in black magic, considering they had no trouble turning Indy into their own voodoo doll.
Which probably worked a little too well.
So what if Hitler heard about this group and went all Hellboy, using both Nazi science and black magic to extract the Thuggee guard's DNA to perform some occult cloning experiments (remember that although it's the second film in the series, Temple Of Doom takes place before Raiders). This would explain why the Nazis employ multiple henchmen who look like Roach. He was their first successful test subject in their attempt to create a terrifying killing machine ... who is also genetically predisposed to always get his ass kicked by an archaeology professor.
6 Game Of Thrones Characters Are Replacing Dead Loved Ones With Lookalikes
Game Of Thrones has a frankly massive cast, so it's not too surprising that they've had some turnover in the last few years for various reasons (scheduling conflicts, boob fatigue, etc). Right around the time Tommen Baratheon graduated from "living prop" to "actual character," Dean-Charles Chapman replaced Callum Wharry in the role.
"I ... I'm gonna at least get some boobage before you cast number three, right?"
However, Chapman wasn't exactly a newcomer to GOT, as he had previously played Martyn Lannister, one of the two Lannister hostages killed by Rickard Karstark, technically making Tommen his own cousin.
Just Lannister things.
That one is easy to miss for most casual fans, but then there's Daario Naharis, who is played by Ed Skrein (season three) and then Michiel Huisman (season four onward), who look absolutely nothing alike.
Daario Nohairis and Daario Hairis.
And here you see Myrcella Baratheon as played by Aimee Richardson (seasons one and two), and Myrcella Baratheon as played by Nell Tiger Free (season five).
Nell Tiger Free is the only GOT actor whose real name sounds more made-up than her character's name.
Wait, there's more! Next we have Gregor Clegane ("The Mountain") who has been portrayed by three different actors: Conan Stevens (season one) on the left, Ian Whyte (season two) on the right, and Hafthor Bjornsson (season four onward) in the middle.
Pouty, Bloody, and Thinky.
These characters are all getting killed and then replaced by lookalikes, which is something that would be fairly easy to get away with in Westeros.
If, say, Myrcella got sick and died unexpectedly, it's obvious that Tywin wouldn't accept it. A marriageable granddaughter is incredibly important to his schemes, so what would he do? He might grab a blonde of similar height and build and pass her off as the princess. It's not like anyone's gonna notice. There's no Facebook or any kind of mass media. The commoners don't even know what royalty looks like; they'd only be going off of general descriptions, if that. Those in the inner circle wouldn't dare spill the secret, and those on the outside who did notice a difference would know better than to spread rumors. Who knows how many Lannisters have died along the way and have been replaced by similar blond cousins for the sake of appearances?
In the same way, if a big scary guy called "The Mountain" dies in battle, you grab another big scary guy and call him "The Mountain." Maybe that's why he has a reputation for being unkillable -- every time he gets killed, they find another big guy to take his place. It's not like somebody is going to do a DNA test. Honestly, compared to zombies, dragons, and a medieval napalm attack, it wouldn't be the weirdest thing Game Of Thrones ever pulled.