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"Twilight Zone" The Thirty-Fathom Grave (TV Episode 1963) Poster

Goofs

Jump to: Anachronisms (1) | Continuity (1) | Errors in geography (1) | Factual errors (2) | Spoilers (1)

Anachronisms 

The diver uses a diving helmet with an oxygen hose. By 1962, the year this episode was made, the US Navy had phased out such antiquated diving equipment in favor of aqualungs.
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Continuity 

The ship's hull number in the opening, exterior shot is DD-944, in the next scene it is DD-946.
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Errors in geography 

It is unlikely that a ship in the Pacific Ocean would be in water only 180 feet deep - equaling 30 fathoms - unless it were close to shore. The Navy ship sends a radio message that its position is 09.3000° S, 160.4800° E. That would place it in about 5600 feet of water and 10 miles from land.
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Factual errors 

The seaweed Doc finds on the corridor floor is rockweed, which wouldn't be found in the South Pacific miles from any shoreline.
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"Doc" Matthews is an NCO corpsman. A ship large enough to be commanded by an officer of staff rank (like Beecham, who wears the insignia of a commander or lieutenant commander) would have a surgeon of commissioned officer rank.
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Spoilers 

The goof item below may give away important plot points.

Plot holes 

The diver McClure finds some dog tags on the sub and brings them to the surface. He knows they belong to Chief Bell when he hands them to the Captain. However, the Captain has to rub off dirt/corrosion before he can read them. If they were too dirty to read, how was McClure able to know who they belonged to?
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See also

Trivia | Crazy Credits | Quotes | Alternate Versions | Connections | Soundtracks

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