The Twilight Zone - "Nightmare at 20,000 Feet"
So it's not a holiday-themed episode, per se, but "Nightmare at 20,000 Feet" is definitely a Halloween classic for Twilight Zone fans!
The episode starred a pre-Star Trek William Shatner as an airline passenger who thinks he sees a gremlin wreaking havoc on the plane outside. The trouble is, he's the only one who catches the creature in the act and struggles to get anyone else aboard to believe him.
Watch "Nightmare at 20,000 Feet" (Episode 3, Season 5 of The Twilight Zone) on CBS All Access.