Hybrid (a segment of the anthology film Beneath the Old Dark House) is the story about a mostly human, part alien, part other… being that escapes from an underground facility. Tracked by an assassin, the creature gets mixed up into the lives of the unsuspecting.
Facebook:
https://www.facebook.com/HYBRIDbtodh/
IMDB:
https://www.imdb.com/title/tt5489568/combined