Hank Mitchell was a hunter and adventurer who captured Lady Kong in the wilds of Borneo. He later sold her to Dr. Ingersoll of the Atlantic Institute for a sum of $10,000 in order for Amy Franklin's heart operation on King Kong to be a success. Mitchell stayed on at the Institute as Lady Kong's keeper, and soon began to fall in love with Amy. He later assisted her in protecting Kong from the psychotic Lt. Colonel Nevitt.