An American Werewolf in Happy Tree Town

Seth becomes a ferocious beast

Plot
Seth is seen walking out of the movie theater when suddenly he is hit in the butt by a tranquilizer dart. When he wakes up, he sees a mysterious man wearing a mask forcing some weird potion down this throat. Automatically, Seth gets a horrible headache and passes out again. The next day, he somehow wakes up in his home. Although confused, he still decides to go on with his day like any other and walks into the bathroom to comb his fur. When he looks in the mirror, Seth notices something he somehow got much furrier overnight. Seth is then shown getting a haircut at The Mole's barbershop to help get rid of all this mysterious new fur. Due to his blindness, The Mole accidentally cuts Seth's ear which causes him to become angry. The anger forces him to grow much taller and muscular, with his voice becoming a deep growling monster-like voice. He then beats up The Mole and starts punching him, eventually killing him in the process. Seth then lets out a long evil laugh and decides to go on a rampage that night. A compilation of Seth killing random characters with the song Werewolves in London playing in the background is then displayed when suddenly, Flippy jumps out from the bushes. Seth thinks that due to his new massive strength that Flippy would be easy to fight so he very stupidly growls at him. Seeing this obvious disrespect from Seth, Flippy becomes more angry than he was before and pulls out his knife. He stabs Seth several times, leaving him dead on the floor. The next scene cuts to Seth as a bear skin rug in the house of the mysterious masked man from earlier. Once he takes off the mask, it is revealed the masked man was Ted from the Seth MacFarlane of the same time. Ted looks at the camera and says,

"There's only bear with the name of Seth and that is me! Well, that's my voice actor's name anyway," and then makes a more evil-sounding version of the famous Peter Griffin laugh.

Deaths
Seth gets stabbed by Flippy and becomes Ted's bear skin rug

Several generic tree friends get murdered by Seth during the brief musical compilation

The Mole gets beaten to death by Seth

Injuries
Seth gets his ear cut off

Trivia
This episode was inspired by Seth Green who played the werewolf character, Oz in the television show Buffy the Vampire Slayer

The episode was another subtle connection due to how the film An American Werewolf in London was directed by Frank Oz who has the same name as the werewolf character mentioned above