My Three Sons S05 E32 Chip O' the Islands

Charley has a visit from an old Australian acquaintance who quickly fires the boys' imagination with tales of a paradise in the South pacific. The adults wonder if he is in fact an expert confidence trickster as he cheats Charley with an unexpected legacy that is responsible for a trip to the tropical island of Cocoa Fuji for Uncle Charley, Robbie and Chip.