The Castaway Cowboy is a 1974 action and adventure film directed by Vincent McEveety. It tells the story of Lincoln Costain (James Garner), a Texas cowboy who gets "shanghaied" and shipwrecked in San Francisco. He jumps ship and is washed ashore on the Hawaiian Island of Kauai. He is rescued from drowning by Booton 'Little Maca' MacAvoy (Eric Shea), a 12-year-old boy who lives with his widowed mother, Henrietta MacAvoy (Vera Miles). Both of them are struggling to make a living as potato farmers as their crops are often trampled upon by wild cattle. Lincoln helps them by turning their failing potato farm into a prosperous cattle ranch. Their prosperity is challenged by Calvin Bryson (Robert Culp), an evil land baron who holds back Henrietta's mortgage in an attempt to grab her land. Lincoln, who was planning to go back to his Texas home, decides to stay with them in order to help Henrietta fight off Bryson's land grabbing attempts.