BR: Someone's Knocking at the Door + The Deep Ones (Vinegar Syndrome)

THE DEEP ONES - A married couple rents a beach side Airbnb only to be surrounded by peculiar neighbors and occurrences. They soon discover that they are in the grip of a mysterious cult and the ancient sea god that they worship.

SKATD - Returning to the medical school where they were test subjects decades ago, a pair of outrageously twisted serial killers use shockingly brutal sex acts to start killing off a group of drugged-out med students.