Gedde Watanabe (who voiced Vincent Wong in this episode) would later appear in Scooby-Doo and the Samurai Sword (2008) as Kenji.
Spy Me a River is a movie about a teen beach heartthrob who becomes a superspy to defeat to the evil Dr. Bikini. This may be a subtle allusion to Dr. Goldfoot and the Bikini Machine (1965), a spin-off of Frankie Avalon's Beach Party movies. The villain was played by Vincent Price, who went on to star in The 13 Ghosts of Scooby-Doo (1985).