Beast from Within

Episode Title Card.

**Beast from Within** is the eighteenth episode of the first season of the animated series, *Martin Mystery*. It was originally released on April 27, 2004.

## Synopsis

A mysterious power outage at the center causes a creature to escape and now M.O.M. is extremely worried. The creature that escaped was Gastromo, the first creature M.O.M. ever caught when she was an agent. When the agents go and search for him, he attaches to one of the agents and takes control and is off to the Center to get his revenge on M.O.M..

## Plot

A slug creature named Gastromo escapes from the center. It infects Martin first with him going through strange side effects such as him eating raw meat. Gastromo inside of Martin captures Jenni and cocoons her. Then Diana figures things out but then Java and M.O.M. get infected as well. All three of the them (Martin, Java, and M.O.M.) go after Diana.

She gets to the Center (M.O.M.'s office) and Diana figures that since Gastromo has been eating so much iron it has made him magnetic and she is right because she hovers an electromagnet over them and it attaches them to it. She then drops them into a big fish tank in the office and everything infecting them is expelled. Gastromo jumps out of Martin and tries to escape but is eaten by a fish. All of them talk about what happened and then Martin and Jenni go on a date only for Martin's clumsiness to ruin it.

## Characters

### **Main**

* Martin Mystery
* Diana Lombard
* Java
* M.O.M.
* Billy

### **Supporting**

* Jenni Anderson
* Antonio

### **Major**

* Toby (rabbit/cat hybrid)
* The Center's Agents
* Principal Pebbleton

### **Villains/Monsters**

* Siren (in a cell)
* Werewolf (in a cell)
* Ms. Dorey (in a cell)
* Gastromo
* Mutated Martin, Java, and M.O.M. (formerly)

## Gadgets Used

### **U-Watch**

* Slime Scan

**Supporting:** Jenni Anderson • Marvin • Gerard Mystery
**Villains/Monsters:****Season 1:** Bogeyman • Monster Insects • The Black Spirit • Leviathan • Werewolves • The Applebyes • Zook • Chaos Beast • Sandman • Siren • Clifford • Christmas Demons of the Snow Globe • Dark Druid • Prindella Grizzwalda Dorey • Nazca Aliens • Philus Blackwater • Dr. Green • Nadu • Icetopis • Gastromo • Doppelganger • Dr. Dolphus • Mothman • Sauros • Ratman • Synths • Highly Evolved Bacteria • The First Chinese Emperor • Wu-Long
**Season 2:** Freeform Aliens • Sock Gnomes • Simone de Bastien • Djini • Montgomery Stokes • Hexan • Alpha Omegans • Beasts of the Perigee • Rasel • Body-Swapper • The Gateway Creatures • Gatekeeper
**Season 3:** Crispangores • Vargos • Damian • Diana's Clones • Mr. Black • Lawn Gnomes • Midget Munchkin • Mutated Sea Monkeys • Phantom Werewolf • Torrington Worm • Morcan the Warlock • Teddy • The Scarecrow • Spirit of the House Builder • The Bones • Labyrinth Creature • Barok the Faceless • Creatures of the Typewriter • Jingle Jim • Venoso • Love Monsters • Mutated Venus Flytrap • Captain Blood • Leprechaun • Octavia Paine • Ultimate Monster

**Season 2:** "They Came from Outer Space" • "Attack of the Slime People" • "The Vampire Returns" • "Crypt of the Djini" • "You Do Voodoo" • "Zombie Island" • "The Lost Tribe" • "Monster Movie Mayhem" • "The Third Eye" • "The Body Swapper" • "Germs from Beyond" • "They Came from the Gateway"
**Season 3:** "Curse of the Looking Glass" • "Mystery of Teen Town" • "Attack of the Evil Roommate" • "Web of the Spider Creature" • "Attack of the Lawn Gnomes" • "Rise of the Sea Mutants" • "Hairier and Scarier" • "Wrath of the Torrington Worm" • "The Warlock Returns" • "Return of the Imaginary Friend" • "Night of the Scarecrow" • "The House of Zombies" • "Rise of the Secret Society" • "Day of the Shadows" • "Return of the Djini" • "Tale of the Enchanted Keys" • "All I Want for X-mas" • "Lovespell from the Underworld" • "Journey into Terrorland" • "Curse of the Six-String Serenade" • "Wrath of the Venus Flytrap" • "Pirates of Doom" • "Rage of the Leprechaun" • "It's Alive"