what is this horror episode?

I use to go to imdb to find movies or shows that I can't remember the name of but that's gone now. Hopefully someone can help me here. All I remember from this episode is some sickly looking guy who comes back from some trip in the mountains/woods and his family puts him in bed in the cabin. He basically looks like a skeleton with huge teeth and eyes bulging out and I think he turns into a cannibal or he's possessed by something. I can't put my finger on it. I am pretty sure it is from a horror tv show but could be from a movie. Any clue?