Since the term "black hole" was coined by John Wheeler in 1967, they have been used to resolve a lot of science-fiction plot inconsistencies.
Sometimes they resolve real-life ones too, especially if there is no other explanation.
HE 0437-5439, is an early-type star and one of ten so-called hypervelocity stars that are speeding away from the Milky Way galaxy - because of its young age, astronomers stated it could not have come from our galaxy. Carnegie astronomers Alceste Bonanos and Mercedes López-Morales, and collaborators Ian Hunter and Robert Ryans from Queen’s University Belfast examined its velocity, light intensity and, for the first time, its elemental composition and have proposed an answer - another black hole.