Martin Mystery
S01E23 The Sewer Thing
A janitor at a research lab comes into contact with a hazardous substance, leading to his transformation into the Ratman.
Season 1 Episodes
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2
3
4
5
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7
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9
10
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It Came from the Bog
Terror from the Sky
Shriek from Beyond
The Creeping Slime
Curse of the Deep
Nightmare of the Coven
Mark of the Shapeshifter
Mystery of the Vanishing
It Came from Inside the Box
Attack of the Sandman
Eternal Christmas
Return of the Dark Druid
They Lurk Beneath
Haunting of the Blackwater
Mystery of the Hole Creature
Fright from the Ice
Beast from Within
Curse of the Necklace
Revenge of the Doppelganger
The Return of the Beasts
Attack of the Mothman
Summer Camp Nightmare
The Sewer Thing
Scream from the Forest
The Amazon Vapor
The Awakening