Z. Race Bannon (voiced by Christopher McCulloch): Brock's friend from the Office of Secret Intelligence, where he once worked as a torturer. Died after jumping from a jet that Nat King Cobra's Snake Men were piloting while retrieving the Goliath Serum. He carries various spy gadgets reminiscent of those carried by James Bond. Hadji Singh (voiced by Jackson Publick): Another reference to a Jonny Quest character, he is now a manager working with Jonas Jr. He is seen also taking care of Johnny, while worrying that if he brings Johnny back home, his (Hadji's) wife will leave him. Dr. Z (voiced by Christopher McCulloch): A reference to a recurring villain "Dr. Zin" in the Jonny Quest franchise, he was featured in the episode "The Buddy System" in which he was to be a special guest star in a stage show featuring Action Johnny. The show was being performed as part of "Rusty's Day Camp for Boy Adventurers." Upon seeing his old nemesis, Johnny panics and has a mental breakdown. Sergeant Hatred, having interrupted the show with what he thought was a routine arching, greets Z with a hand shake, saying "The Dr. Z! Aw man, I love your work." In "Self-Medication" Dr. Z was confronted by Action Johnny, Dr. Venture, and a group of former "Boy Adventurers" to accuse him of the murder of their therapist. However, Dr. Z was innocent and the group discover that he is married. During a peaceful dinner Dr. Z advises the former "Boy Adventurers" that they need to grow up and stop living in the past, revealing that he feels that he had wasted his life and wished he and his wife could have had a normal marriage. In "Pomp and Circuitry", one of the silhouetted members of the Council of 13 looks and sounds a lot like Dr. Z. Appears to be a homage to Fu Manchu, an evil genius from a series of novels by English author Sax Rohmer. In "What Color is Your Cleansuit?" Dr. Z appears in an old Guild PSA to warn against the dangers of blundering henchmen. In "Bot Seeks Bot", Dr. Z is confirmed to be a member of the Council of 13. He is a member of the new Council of 13 in season 6, having survived the Sovereign's purge of the old Council. Mrs. Z (voiced by Seth Green): Dr. Z's wife of many years