Synopsis

Ten-year-old Coop Burtonburger's life takes a turn for the worse when his little sister, Millie, brings home a mysterious stray cat who, in reality, is an evil cybernetic alien in disguise. To make matters worse, neither his family nor anyone else believes him, except for his best friend, Dennis. Now, Coop risks his life every day as he attempts to foil the cat's diabolical schemes and prove to… the world that the family pet is an evil mastermind.

The series' pilot was first shown off at MIPCOM Jr. in 2006, and the series was officially revealed under the title Look What My Sister Dragged In in February 2007, where Studio B signed a development deal with YTV for the series.

The series' production was started in January 2008, and it was animated in Flash.

On February 12, 2008, after purchasing Studio B Productions, their new owner DHX Media announced they had licensed out the TV, home video, and consumer product rights for the series to Jetix Europe in areas where the company operated Jetix channels, while Disney-ABC International Television would handle TV distribution in these territories.

On April 15, 2008, the series was pre-sold by Decode to air on Toon Disney's Jetix block in the United States.

On October 19, 2009, DHX announced that the series had been renewed for a second season.

By then, the series had been airing on over 10 Disney XD channels around the world.