Sealab 2020
The Deepest Dive still
S01E09· aired 11/4/1972

The Deepest Dive

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Nexus es843917TMDb ep 18716TVDb ep 11579

Overview

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.