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Other criminals and organized crime bosses on the islands were played by actors such as Ricardo Montalbán, Gavin MacLeod, and Ross Martin as Tony Alika.

By the 12th and final season, series regular James MacArthur had left the show ( in 1996, he admitted that he had become tired and wanted to do other things ), as had Kam Fong.

Unlike other characters before him, Fong's character Chin Ho, at Fong's request, did not just vanish from the show but instead was murdered while working undercover to expose a protection ring in Chinatown in the last episode of season 10.

New characters Jim ' Kimo ' Carew ( played by William Smith ), Lori Wilson ( played by Sharon Farrell ), and Truck ( played by Moe Keale ) were introduced in season 12 alongside returning regular character Duke Lukela.