Chase is a German Shepherd police pup in PAW Patrol, the animated children's series that began in 2013, and 'Chase is on the case!' is the line he uses when he is called to lead a rescue mission. The phrase stuck because it is short, repeatable and tied to one of the show's most recognisable characters, and it travelled beyond television as parents, fans and meme makers reused the clip in short videos. It remains popular as a quick way to signal that someone is ready to solve a problem.