“SNL50” delivered another Kate McKinnon-led alien abduction sketch, with some especially big names making a surprise appearance, including Meryl Streep, who showed up as McKinnon’s similarly filthy-mouthed mother.

At “SNL50,” Kate McKinnon reprised her popular character Miss Rafferty from her series of Close Encounter sketches, surrounded by the all-star ensemble of Pedro Pascal, Jon Hamm, Woody Harrelson, Aidy Bryant — with Meryl Streep appearing as her mother,