|First Appearance||The Earth Bull|
|Portrayed by||Mark Lewis Jones|
Maguire or Mac was the uncle of Jason and was the captain of a large vessel.
He helped Jason search for his missing father underwater using a sub. He asked Jason if he could talk him out of doing such a dangerous risk. He also asked Jason if his father would want his son to risk his life. He finally accepted that Jason had made up his mind and told him he hoped he found what he was looking for, whatever it was. (The Earth Bull)