Diane's suicide triggers memories of others that Magnum has loved who have been killed, sending him into a spiral of depression. Magnum's sanity comes into question when he thinks he has seen his old friend Lt. MacReynolds walking down the street. But "Mac" is dead, so who did he see?

T.C. finds himself in troubled waters when he agrees to make some curious inter-island deliveries, but before he can make the drop-off, his helicopter plunges into the sea.