Wonder Pets! is an American animated children's television series that premiered on Nickelodeon in 2006, following three classroom pets who work together to help animals in trouble. Its theme song begins with the repeated line about the phone ringing, signalling that a new rescue is about to begin. Years after the show ended, that opening became a familiar nostalgic cue online, shared in throwback edits, memes and short videos whenever someone wants an instantly recognisable signal that help is needed.