Voyage to the Bottom of the Sea (TV series) as Admiral Park, a colleague of Nelson's who substituted for him. Basehart returned for "Return of the Phantom," the final episode of the season. The third season of "Voyage to the Bottom of the Sea" ran simultaneously with two other series produced by Irwin Allen, "Lost in Space" (in its second season) and "The Time Tunnel". The third season began with Dick Tufeld of "Lost in Space" playing an evil disembodied brain from outer space. The season continued with a werewolf story that is one of the few episodes to inspire a sequel. In one episode, the "Seaview"'s officers and
Voyage to the Bottom of the Sea (TV series) title character in "The Mermaid" (Diane Webber), who did not speak. The fourth and final season of "Voyage" began with Victor Jory playing a five-centuries old alchemist and the "Seaview" is threatened by the hydrodynamic effects of a major volcanic eruption. After a few episodes there were revamped opening credits depicting action sequences and the stars' pictures in color set on a sonar board design. The closing credits picture remained unchanged from season three. Near the end of the fourth season, there were three unrelated stories of extraterrestrial invasion. One episode had an unknown master of disguise infiltrating and wreaking