During "Power Rangers Zeo", Bulk and Skull remained members of the Junior Police Force (even getting a new motorcycle with a sidecar). They remained members until Bulk's attempts to woo the police chief's daughter accidentally caused Lt. Stone to be fired. They quit the force out of loyalty to Stone and joined him when he opened his own detective agency. While they initially continued to be scared of monsters, their sub-plots would shift towards their detective work after they switched jobs. In "The Joke's On Blue", they also had to clash with a rival gang of detectives, Humphrey and Bogart, who were trying to frame a new student named Robert for a series of practical jokes all over town, until Kat and Tanya helped expose the rival detectives as the practical jokers with the help of the owner of the novelty shop in identifying both Humphrey and Bogart as his best customers.