"Killjoys" is a science fiction television series that aired from 2015 to 2019. The show follows a group of bounty hunters known as Killjoys who operate in a distant planetary system called the Quad. They navigate complex political landscapes and personal relationships while capturing criminals and fulfilling contracts. The main characters include Dutch, John, and D'avin, who each have unique skills and backgrounds. The series explores themes of loyalty, identity, and the consequences of choices, all set against a backdrop of action and adventure in a richly developed universe.