Mike Nelson is a S.C.U.B.A. diver in the days when it was still very new. He works alone, and the plot was mostly carried through his voice-over narrations. These gave the show a flavor of a radio program. Typical adventures were finding a downed satellite or sunken treasure.
Cast:Lloyd Bridges , Ken Drake , Courtney Brown , Jan Harrison , William Boyett , Richard Probert , Russ Conway , Leonard Nimoy , Frank Warren , Zale Parry , John Zaremba , Ross Elliott , A.G. Vitanza , Anthony George , Lisa Gaye , Rodolfo Hoyos Jr. , Ric Marlow , Charles Maxwell