By Season 4, most of the original writers had left the series. Stories and story arcs included a courtship and marriage between Sonny Crockett (Don Johnson) and Caitlin Davies (Sheena Easton), and a plot in which Crockett developed amnesia (during which he mistakes himself for his drug dealer alter ego, and becomes a hitman). Moreover, Caroline Crockett, Sonny's first wife, as well as his son Billy reappear briefly.