The film features several returning cast members alongside notable replacements:
(Phillip Rhys): The "Supernova Girl" singer who helps Zenon on Earth.
(Tom Wright): A worker in the Alien Patrol lab and a new love interest for Zenon.
: The film features "Zap-Pads," handheld communication tablets similar to modern tablets, and includes a humorous reference to a fictional "Stock Market Crash of 2006".
(Lauren Maltby): Zenon’s former rival who eventually becomes an ally.