![](https://image.tmdb.org/t/p/w342/de8OORepBZTiHit18m4tCdlb2Lw.jpg)
73.333 Mga Panonood
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.
Unang Petsa ng Hangin : Sep 09, 1972
Huling petsa ng Air : Dec 02, 1972
Episode : 13 Episode
Panahon : 1 Panahon
Runtime: 20 minuto
Studio: NBC
Bansa: