Three monster loving kids are sent to visit their grandfather. They are delighted to learn that grandpa lives in the most haunted city on earth.
Delighted by the idea of being monster hunters in training, Edith and Bo decide to stay and fulfill their destiny. But Ernest has serious doubts.
The monster loving maniacs dive a little deeper into the fascinating world of "time slime". The most effective weapon in a monster hunter's arsenal.
When the monster alarm goes off, Arthur and the kids embark on their first mission together to counter a threat of enormous size and appetite.
A small paranormal disturbance quickly escalates into a full-blown animal exorcism ritual. But how do you drive a demon from a possessed hamster?
In a battle for control of the TV, Arthur and the kids make a bet. The kids have 24 hours to scare Arthur's pants off.
Furious with Arthur's refusal to teach her anything vampire-related, Edith leads a reckless mission to awaken a dangerous, undead substitute teacher.
Ernest goes on his first date. But Gruselbrook can be dangerous at night. Turns out the girl next door has a secret inside the mirror.
Mermaids are nice, sure. But the freshwater kind - Not so much. Perhaps the lady of the lake needs help from three young monster experts.
Tonight's lesson is ghost hunting. Get ready to meet Arthur's "terrifying" house ghost, Rebecca. But how can a ghost be living with a monster hunter?
Bo gets abducted by a family of trolls and loves it. Arthur completely overreacts as usual, setting the stage for a confrontation in the forest.
Dracula points Edith in the direction of an ancient book about vampires. The treasure hunt is on. But can you really trust a vampire?
Arthur tells the story of how he managed to capture Dracula in the past. It is a gruesome tale of blind luck, betrayal and doom.