It’s High Noon.

Marge Simpson sits on a blue couch in a living room, looking toward a large window where a figure in a dark hooded outfit and a white skull-like mask stands outside, holding a knife and making a hand gesture. The figure then disappears and is replaced by a man in a brown cowboy hat and blue uniform, who stands outside the window holding a baton. Marge turns her head to look at the new figure.