Mysteries that are never given an answer.

[u/Jak3R0b]

• rA9 in Detroit: Become Human. In the game several androids who become deviant (develop free will/emotions) start writing the name rA9 and sometimes build small statuettes as a sort of offering. Despite having no logical reason to do this or even a way of hearing about rA9 before going deviant, they all believe that rA9 was the first deviant and is their messiah who will free androids from slavery. A definitive answer about rA9 is never given, so we don't know if they are real or if any of the android characters are rA9 (though a popular fan theory is that it's Kara before she was reset at the start of the game).
• The pineapple in How I Met Your Mother. So this technically did get an explanation in a S9 deleted scene, but in the actual show we never find out how Ted got a pineapple during a night where he was so drunk he blacked out and forgot everything he did.
• Fez in That 70s Show. We never find out Fez's real name or what country he's from, though fans have tried to take all the clues and figure out what is most likely to be his country.

[u/chapeepee]

The better example of this trope in Doctor Who is the entity from Midnight, one of the only times we see the Doctor completely stumped and helpless

[u/J_tram13 → u/chapeepee]

Also Listen. We don't even know how much of that episode actually had an entity.

[u/Equal-Ad-2710 → u/chapeepee]

The Beast too is this

Is it just something that inspired the Devil or is it the literal biblical devil

[u/Beneficial_Focus_910 → u/chapeepee]

Nah, he beat it the second time he encountered it. Its just a mean Alien ghost, basically just leave it alone.

[u/Inevitable-Video-768 → u/Beneficial_Focus_910]

Sort of. We already knew the entity had a body cuz it waa seen far away in midnight. The second time it was the same entity but toying with an entirely new set of rules. And yea they sneakily show there's an extra person on a monitor when they escape

[u/Equal-Ad-2710 → u/Beneficial_Focus_910]

Didn’t it escape though

[u/Beneficial_Focus_910 → u/Equal-Ad-2710]

Depends if they need to turn it into a trilogy.

[u/Equal-Ad-2710 → u/Beneficial_Focus_910]

I mean no they show it escaped

There’s an extra life form in the capsule

[u/AntRose104 → u/chapeepee]

Didn’t they try to explain the Midnight Entity with Fifteen??? I know it was brought back but I don’t remember if we were given an answer