Jack Harding

Jack Harding is the main antagonist in 3 Ninjas: Knuckle Up. He is played by Charles Napier.

Jack is an industrialist, who owns a landfil and a waste facility. He illegally dumps many toxic substances into his landfil, which is harming nearby lands and a Native American village, where villagers have died due to his harmful practices. His henchman kidnap Charlie, one of the Native Americans, who has appealed for a court date for a hearing about Jack's business. He also has a floppy disk with evidence, which will put Jack out of business. Jack later arranges his thugs to kidnap Jo, Charlie's daughter to persuade Charlie to falsify his evidence at the hearing, which he begins to do. Later on, Jo and the 3 Ninjas arrive at the hearing and then Charlie presents the EPA with the disk and Jack's business is shut down for good.