Question: are you afraid of the dark most scary episode?
Answer: The Tale of Laughing in the Dark (Season 1, Episode 2) ... 
The Tale of Vampire Town (Season 6, Episode 11) ... 
The Tale of the Dead Man's Float (Season 5, Episode 1) ... 
The Tale of the Midnight Ride (Season 3, Episode 1) ... 
The Tale of the Ghastly Grinner (Season 4, Episode 9)