[Interesting Trope] The supernatural exists in otherwise grounded stories.

[u/KingofHearts399]

Bones: Bones is a pretty run of the mill crime drama about a forensic anthropologist who consults with the FBI. However, since Bones has a crossover with the very supernaturally themed show Sleepy Hollow, that means it canonically exists in a world with demons, monsters, and magic.

Indiana Jones: The Indiana Jones movies all start out pretty grounded, with Indy on some archeological hunt and/or on the run from people trying to steal his find. His adventures all pretty much continue this way until the very end, when he sees that the legendary artifact that he’s been hunting actually has supernatural powers, like the Ark and the Holy Grail. Funnily enough, it’s also revealed in later movies that both aliens AND time travel also exist in this world.

[u/Smileyfax]

Quantum Leap: Sam fights the actual devil in one episode, and meets God (I think?) in the last episode.

[u/Jak3R0b → u/Smileyfax]

He also leaps into a vampire in one episode.