"The Werewolf of Fever Swamp" is probably the scariest episode of the series, due to its genuinely creepy atmosphere and a scary-looking and -sounding werewolf.
The episode even has animals that are killed by the werewolf (off screen, but still disturbing)!
We never get a clear look at the werewolf's face during its attack on Grady and his family, only brief glimpses through shadows, which makes this monster all the more terrifying.
The Swamp Hermit confronts the werewolf after his trap manages to save Grady by catching something, but when he finally arrives and gets a good look through the low light...
"A deer...?" (Eyes widen before he whips around) "RUN, BOY!" (The werewolf tackles him from the foliage and mauls him)
Like many entries, the ending to Fever Swamp. Grady's parents check on him as he's sleeping, thinking he might be over a series of nightmares following the werewolf's attack. But, just as soon as they shut the door, Grady lurches out of bed as an angry snarling werewolf, only to wake up as himself again, having experienced this as another nightmare. After he wakes up, he hears a wolf howling at the full moon. At the same time, Will's werewolf skeleton emerges from the swamp. The wolf's howls grow louder, and Grady soon begins howling himself. It's unclear whether it's a result of the swamp causing him to have a fever which makes him delirious, or just a result of a very traumatic experience.
