Cathy is an alien girl who came from the Planet Rhapsodia. She and her grandfather, Mr. Smith came to planet Earth to power a super secret organization. Together with her 3 friends, Sam, Danny and Chris, they formed the Monster Buster Club. The show debuted on Disney Channel Asia on May 3rd, 2008, June 2nd, 2008 in Jetix Europe and June 9th, 2008 on Jetix on Toon Disney in the United States.
New episodes of "Monster Buster Club" premiered Mondays at 7:00pm (ET). When the Toon Disney/Jetix channel was rebranded as Disney XD, new episodes began premiering Saturday mornings at 10:00am (ET).
Cathy Smith - the girl from the planet Rhapsodia. She came to Earth with her grandfather, Mr. Smith to form a secret organization, the Monster Buster Club. She usually wears pink MBC suit and even in her normal suit. She has a stretching power. She has blue eyes and blonde hair. She also has the ability to lift objects with her mind. She is an energetic girl without much knowledge about planet Earth. She is also 700 years old. She is also known as "The Fireball".
Danny - the "Mr. Popular" guy who usually wears a red Monster Buster Club suit. He usually wears purple suit when not in the MBC suit. He also has rivalry with Mark. He has brown hair and green eyes.
Chris - also known as "The Gizmo Dude". He is also the computer geek and the technology expert but very helpful in most situations. He normally wears blue-green suit and has a navy blue eyes and light-blue eyes. He's not a troublemaker. His brother, John, is also a technology expert like Chris. He also never had detention.
Sam - the genius and the brains of the Monster Buster Club. She wears a yellow suit both in regular suit and in MBC suit.
(Narrated by Cathy) Hi, my name is Cathy. My grandpa and I came from the Planet Rhapsodia to power up a secret society. With my new friends, our mission is to battle trouble-making aliens around Single Town. We are the Monster Buster Club!