ROMUALDO CASTILLO aka ROCA is a charismatic multilingual actor best known for his performances in the CBS's prime time TV Shows "NCIS HAWAII" as William Strafford, "MAGNUM P.I" as Christophe Midi and "HAWAII FIVE-O" as Guillermo and Koslov. He was raised in France and Spain and then went on to study in England. He Lived in Hawaii for 10 years and ...