Doubt: The Scott Watson Case: In the early hours of New Year’s Day 1998, Olivia Hope and Ben Smart boarded a yacht with a man, and were never seen again. The case enthralled the nation, and 18 months later Picton man Scott Watson was convicted of their murders. Watson has always maintained his innocence. Legal expert Dr. Chris Gallavin re-examines the case from a fresh perspective. Going back to the night of New Year’s Eve, 1997.