00:01Imagine opening your front door and finding the ocean on the other side.
00:05Not a beach, not a dream. The actual Pacific Ocean.
00:09You take one step forward, and suddenly your shoes are sinking into warm sand.
00:14You turn around, grab the door handle, and step back into your house. Everything is normal.
00:20Then you open the door again. This time there's snow.
00:23You're standing in the middle of a frozen street in New York City.
00:26Snow is falling. Cars are buried beneath ice.
00:30Your breath turns into mist. You slam the door shut.
00:34Your heart is racing. But then you notice something.
00:37The door didn't move. The house didn't move.
00:40Only the world behind the door changed.
00:42So naturally, you try it again.
00:44You open the door, and you're standing in Las Vegas.
00:47Neon lights are glowing. Cars are flying down the road.
00:50Music is blasting from casinos.
00:52You close it. Open it again.
00:54A rain forest. Again.
00:56A desert. Again.
00:58The top of the Empire State Building.
01:00And then, the middle of the ocean.
01:03At first, it feels like the greatest invention in human history.
01:07Forget airplanes. Forget highways. Forget airports.
01:10Need to get from California to New York?
01:12Open a door?
01:13Need to visit Paris?
01:15Open another?
01:16Want to see the pyramids?
01:18Just find the right door.
01:19But there's one problem.
01:21You don't know where the doors lead until you open them.
01:23And that changes everything.
01:25Because what happens if you open one and the other side is dangerous?
01:28You open your bedroom door one morning.
01:31Instead of your hallway, there's a dark forest.
01:34You can hear something moving.
01:35You immediately close it.
01:37Then you hear three knock from the other side.
01:41You freeze.
01:42The door hasn't moved.
01:43But someone or something is knocking.
01:45You step backward.
01:47And suddenly another door appears.
01:49Then another.
01:50And another.
01:51Within hours, your house is filled with doors.
01:54Every single one leads somewhere different.
01:57Some lead to beautiful places.
01:59Some lead to places you've never seen.
02:01And some seem to lead to places that shouldn't exist.
02:04One door opens onto a city you've never visited.
02:07But somehow do you recognize it?
02:09You walk closer.
02:10The streets are completely empty.
02:13Cars are abandoned.
02:14Buildings are dark.
02:16And then you notice the strangest part.
02:18There's a house at the end of the street.
02:21It looks exactly like yours.
02:23Same walls.
02:23Same windows.
02:24Same front door.
02:25You slowly approach.
02:26And before you can touch it,
02:28your door behind you slams shut.
02:30Now you're trapped.
02:32You run back.
02:33The handle won't turn.
02:34You pound against the door.
02:37Nothing.
02:38Then you hear footsteps from inside the house.
02:40Someone is walking toward its front door.
02:43You stop.
02:44The door opens.
02:45And standing there is you.
02:48Same clothes.
02:49Same face.
02:50Same expression.
02:51But this version of you looks terrified.
02:53He points toward your door and whispers,
02:55Don't open another one.
02:57Then the connection disappears.
02:59You blink.
03:00You're back inside your house.
03:02But now you understand something.
03:05These doors aren't random.
03:06They're connected.
03:08Perhaps they're all part of the same system.
03:10A network of worlds.
03:11And if that's true,
03:12then one question becomes impossible to ignore.
03:15Who built it?
03:16You begin experimenting.
03:18You mark every door.
03:19You record where each one leads.
03:21You discover that some stay the same.
03:23Others change.
03:24But one door is different.
03:26It never shows a location.
03:27Every time you open it, you see your own house.
03:30Except something is always different.
03:32The first time, no one's inside.
03:34The second time, the lights are on.
03:36The third time, you see yourself walking through the hallway.
03:39The fourth time, you see yourself standing behind the door.
03:44Watching you.
03:45That's when you realize the terrifying possibility.
03:48Maybe these doors aren't taking you to different places.
03:51Maybe they're taking you to different versions of your own world.
03:54Different timelines.
03:55Different choices.
03:56Different versions of you.
03:58And perhaps every time you open a door,
04:00another version of you is opening theirs.
04:04You stare at the mysterious door.
04:07Your hand reaches toward the handle.
04:09You know you should stop, but curiosity wins.
04:12You turn the handle.
04:13The door opens.
04:14And for the first time, there is no city, no forest, no ocean, no desert.
04:18There is only darkness.
04:20Completely silent darkness.
04:22Then, far away, a tiny light appears.
04:26You step closer.
04:27The light grows brighter.
04:29And you realize it's another door.
04:32Standing alone in the darkness, you walk toward it.
04:35Your hand reaches for the handle.
04:37And just before you open it,
04:38you hear a voice from the other side.
04:41Your own voice.
04:42It says, you finally found the first door.
04:45Because if every door leads somewhere,
04:48then the real mystery isn't where the doors go.
04:51It's this.
04:52Where did the very first door come from?
