Supernatural: Nightmare Logic Season 14, Ep 5
After a hunt gone wrong leaves Maggie's whereabouts unknown, Sam, Dean, Mary and Bobby race to find her, but what they find are their own worst nightmares.
Avatar: The Last Airbender: Nightmares and Daydreams Rewatch Season 3, Ep 9
The gaang is four days ahead of schedule for the invasion, so they take some time for a little rest and relaxation on an uninhabited island. Everyone is happy to unwind for a few days, except Aang is haunted by nightmares and decides it's just best to forego sleep. Meanwhile, Zuko is still trying to find his place in life, even when he's treated as royalty, and even honored and trusted by his father.