The Deepest Dive Sealab 2020 : Season 1 Episode 9
TV-Y7 NBC 30m
Aired: November 4th, 1972 @ 8:00 AM EST on NBC
Hal, Ed, and Gail plunge to the lowest depths of the ocean in a special crystal bell to plant a second seismographic signaling device after the first one mysteriously disappears.
