Magnum, P.I. (1980)

The Crown Prince of Jororo accompanies his teammates when their baseball team comes to Hawaii to play T.C.'s team, and takes up residence on the estate as a safety precaution against the death threats he's received. Thomas strikes up a friendship with the boy, who is eager to escape the ever watchful eyes of his bodyguards and governess, and who has a nasty habit of escaping whenever the opportunity presents. When terrorists attempt to assassinate the young prince, Thomas goes all out to protect him from his father's enemies, who turn out to be closer than anyone imagined.