Fred attempts to hone the gang's mystery solving skills by taking them out camping in the wilderness. A perfect mystery opportunity soon comes along when they discover that viking ghosts have scared away all the tourists from camping in the area. However, the gang has to avoid the park ranger in the process, or risk being sent to "Forest Jail" forever.

Daphne takes the gang to her family's ancient castle where a giant is protecting it from the visitors. As the gang tries to solve the mystery, Daphne starts speaking Irish and Fred wears knight armor.

The gang gets trapped in an ancient Greek palace, where they must find a scroll to escape.

Fred tries to solve a 700-year-old mystery in Japan; Daphne becomes a viral sensation.

When a successful video game company tries to convince Velma to work for them in San Francisco, the gang becomes embroiled in the mystery of a video game villain.

Scooby Doo runs into an old kennel mate from the rescue shelter, Axel, who is now a state-of-the-art, highly trained K-9 police dog.

The gang investigate the mysterious Professor Huh?, who pits them against another rival gang led by a childhood friend of Fred.

Velma's got an interview at the prestigious Kingston University, the most selective school in the country. The only catch? The dean wants her and the rest of the Scooby gang to figure out why the ghost of Elias Kingston, the school's founder, is haunting Kingston's book-filled halls!

With Fred not sleeping the gang decides it is time for a vacation. However their relaxation is short lived when a monster shark terrorizes the beach. The gang must solve the mystery whilst making sure Fred relaxes and doesn't get involved

The gang is on a 3-day trip on a train, but when 8 monsters from different parts of the world appear, it's time for action. The monsters are the Grim Reaper, a Mummy, Tzitzimitl, Haniver, a Manticore, Hemogoblin, Tengu, and Tarasque.

The gang gets caught up in international espionage when they cross paths with British secret agent, Jenny Vex, and must help her complete her dangerous mission.

Fred's worst nightmare comes true when an evil spirit possesses the Mystery Machine and turns his beloved van into an unrelenting monster.

The gang travels to Britain in 1843-ish and runs into Scrooge who claims he was attacked by the ghost of his partner Jacob Marley and that three more ghosts are coming. The gang agrees to solve the mystery but Velma wonders if she has more potential than just solving mysteries.

When Scooby falls sick, the gang immediately rushes him to the hospital, only to discover it is being haunted by a werewolf. The gang must help Scooby and solve the mystery.

The gang heads to a renaissance fair from Velma's childhood and must act out the middle ages. A mystery is revealed when the spirit of a jester begins attacking the fair and the gang must quickly come to the rescue.

The gang tours an old Hollywood Studio, but they soon uncover a mystery concerning the ghost of a silent film comedy star who has returned to make sure his recently discovered final film is never seen.

Fred gets to live out his childhood dream of being a stage magician when a mutant rabbit monster terrorizes a magic club.

Daphne brings the gang to a fancy ice hotel where a new exhibit of ice age artifacts is opening; things heat up when a frozen Ice Man goes on a rampage inside the hotel.

The gang are caught in a witch's revenge for the Salem witch trials.

Shaggy is surprised to see his old childhood first crush has become a goth; embarrassed that he hasn't changed at all, Shaggy attends a goth party with the gang.

The gang goes aboard the Air Gigantica and tries to stop a gremlin from sabotaging the flight. Meanwhile, after the pilot quits, Daphne has to try to land the plane safely before it crashes.

Shaggy and Scooby, sick of the monsters and mysteries, leave the Mystery Gang.

The gang decides to go to a dog show in New York, but they soon discover a mystery. With Fred undercover, Scooby trying to win the respect of other dogs, and Velma and Shaggy switching personalities, it's going to be a tough case to crack.

The gang heads to Shaggy's beloved grandmother's Florida retirement home, where they learn a crazed ape man has been frightening the elderly residents.

Velma runs for mayor to bait the ghost that has returned to a town and scare the mayoral candidates.