The Killer Tomatoes are the main antagonists of the sci-fi comedy series of films, cartoons and video-games and, as the name suggests, are tomatoes of a deadly nature that seek to take over the world. The tomatoes have the ability to kill a human, but it is unknown how they kill humans in the first film.
In the first film, Attack of the Killer Tomatoes, they do not have any mouths or even faces (which they had in the third and fourth films Killer Tomatoes Strike Back and Killer Tomatoes Eat France) to eat humans. Also, in the first film, the tomatoes have the ability to create explosions and roll quickly to chase humans. However, they were defeated when the song "Puberty Love" was played, which was so horrible that the tomatoes shrink to miniature size and are squashed on.