Shiver and Shake, That Demon's a Snake is the fifth episode of the original half-hour, Scooby-Doo and Scrappy-Doo.
Premise: The kids, on vacation in the Florida Keys, encounter the Snake Demon. And by mistake, Daphne buys an idol cursed by the Snake Demon.
Animation mistakes and/or technical glitches: Daphne's scarf turns gray when she calls for Shaggy and Scooby on the ship. When Shaggy and the dogs first meet the Snake Demon, and Scooby runs off, his captain hat falls on the ground and then disappears. Inconsistencies/continuity errors and/or goofs/oddities: Defarge looked more light-skinned when he was unmasked.