Infinity Train

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The Infinity Train is the main setting of the eponymous series.

Description
While it appears as a regular train on the outside, it is actually of seemingly infinite length. Inside of its many boxcars, practically anything conceivable can be found, whether it be puzzles, objects, or even entire worlds. According to Owen Dennis, it is around 5 stories tall. Passengers picked up by the train are processed through the Tape Car, where their memories are recorded on a video tape. They are then given a number engraved onto their right palm to track their progress through the train before being sent in a special pod to one of the cars. They are unable to leave the train until their number reaches zero, upon which a door leading them home will open.

According to Owen Dennis, time on the train runs parallel to the real world, with passengers picked up from the train disappearing in the real world for the amount of time they remain on the train. In-show, this is confirmed by Nate frantically reuniting with Jesse, and alluding to the latter's disappearance.

For presumably maintenance purposes, cars are able to climb on top of and travel very quickly over the train (Grace calls these cars "shifters"). Shifters follow the following sequence:


 * 1) The bridges that span across cars retract (presumably while the car decouples from its neighbors)
 * 2) *The railings fold into the bridge's floor
 * 3) *The floor splits at the middle of two cars
 * 4) *The segmented floor folds onto itself (the outer segment folds down and onto the inner segment and disappears)
 * 5) *The last floor segment gets pulled into a slot below the car door is
 * 6) The front and back wheels pivot so that the gears adjacent to each train wheel extend forward and engage with the teeth running down the front and back of its neighboring cars which help by closing in and pushing against the shifter
 * 7) The car climbs on top of one of its former neighbors
 * 8) The two neighboring cars close the gap and presumably couple to each other
 * 9) The shifter stops so that the front and back wheels (which were spinning in opposite directions to climb up) can choose the same direction to roll in

For one reason or another, the coupling and decoupling mechanisms are never shown in action. Shifters seem to move incredibly quickly.

History
Very little information is provided on the train's origin and history, although a stray comment by The Cat in "Le Chat Chalet Car" suggests it is at least centuries old, possibly existing prior to when railway locomotives were invented. According to series creator Owen Dennis and supervising director Madeline Queripel, the train appears to passengers when they are at a crossroads in their life, where they could go down one path or another.

Tulip first encountered the train after she ran away from home to try to get to the game design camp in Oshkosh on her own. Upon trying to board, the train sucked her into the Snow Car.

Train Cars
These are the cars that are attached to the train and have been shown/mentioned in the show.

Possible/Unknown Cars
These are the cars that were not shown to be real, but instead were suggested in the show. Should the Infinity Train be truly infinite, the existence of these cars is guaranteed:

Trivia



 * In the early art of drawing the train, each car was supposed to be stamped with the train's insignia, but was removed in the Pilot. The symbol was an Ouroboros fashioned into the infinity symbol with a waning gibbous moon above it (the moon is red and the shadow on it is black; inversely, it could also be a waxing crescent).
 * The infinity symbol is a mathematical symbol used to show the concept of infinity. The Ouroboros (a snake/serpent eating its own tail; usually drawn as a circle) is an ancient symbol used to depict continuity, cycles, and infinity.
 * According to Amelia, the train cars reset after a while, never rendering the puzzles in cars obsolete. This is seen with "The Hey Ho Whoa Car", when the rock-denizens in said car vanish and begin to refill after Amelia first passed through the car.


 * The Train itself can change its appearance when offering a new passenger to board, seemingly adapting to the personality and situation of the passenger in an attempt to lure them onto the train. In Tulip's case, the Train manifested itself as a fairly normal train, luring Tulip onboard by suggesting that the Train was travelling to Oshkosh. In Amelia's case, the Train manifested itself as a sleek, shorter futuristic car, appealing to her passion for engineering and technology. Finally, for Grace, the train manifested itself as a white/gold, lavish train with a long red carpet that led Grace inside, appealing to her desire to be acknowledged by others.


 * In the pilot design of the train, the engine appears to have a valve gear, a typical gear that a steam locomotive has. But the train doesn't have a piston, so it is unknown if the train is designed after a Steam or a Diesel locomotive.
 * According to Owen Dennis, the train is considered an internet myth in the outside world, though former passengers have been able to get in touch to talk about their experiences.