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The Giant Behemoth (1959)
"Behemoth the Sea Monster" (original title)

Not Rated  |   |  Drama, Fantasy, Horror  |  3 March 1959 (USA)
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Ratings: 5.8/10 from 1,265 users  
Reviews: 60 user | 28 critic

Marine atomic tests cause changes in the ocean's ecosystem resulting in dangerous blobs of radiation and the resurrection of a dormant dinosaur which threatens London.


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Complete credited cast:
Gene Evans ...
Steve Karnes
Prof. James Bickford
John Turner ...
Leigh Madison ...
Jean Trevethan
Dr. Sampson, the Paleontologist
Maurice Kaufmann ...
Mini Submarine Officer
Henri Vidon ...
Tom Trevethan
Leonard Sachs ...


The dumping of radioactive waste in the ocean disturbs a prehistoric monster than can project electric shocks and radioactive beams. After terrorizing the English coast, it is discovered that if the creature is destroyed with conventional weaponry it would spread a dangerous amount radioactive contamination over the entire country, with this fact preventing the military from attacking the monster as it nears London. Written by Jeremy Lunt <>

Plot Summary | Plot Synopsis


The Biggest Thing Since Creation! See more »


Not Rated | See all certifications »

Parents Guide:






Release Date:

3 March 1959 (USA)  »

Also Known As:

The Giant Behemoth  »

Filming Locations:


Company Credits

Show detailed on  »

Technical Specs


Sound Mix:

(RCA Sound Recording)

Aspect Ratio:

1.66 : 1
See  »

Did You Know?


Willis H. O'Brien and Pete Peterson completed a significant amount of the stop motion animation on a table in Peterson's garage. See more »


In the establishing scene on board the ferry just before the monster attacks, the little girl with the doll is first seen sitting on a bench in the middle of the deck, then from above sitting along the ferry's port side, then back again in the center bench. Several other passengers switch positions in various shots as well. See more »


Steve Karnes: [looking at the instrument plate] This is very impressive, but I'm not going to perform surgery... I'm going to cut a fish.
See more »


Featured in Cheezy Fantasy Trailers (2006) See more »

Frequently Asked Questions

See more (Spoiler Alert!) »

User Reviews

Goodbye, Picadilly (almost!)
8 April 2001 | by (Vancouver, Canada) – See all my reviews

Essentially a remake of THE BEAST FROM 20,000 FATHOMS with the dinosaur emitting radiation instead of a deadly disease this is still a good film. Originally the monster was supposed to be invisible (hence the scene where it does not show up on radar) but the producers said that would never do and a monster must be seen by the audience! So Willis O'Brien and Pete Peterson were brought in late in the game to do some effective stop motion effects. The low budget shows. Notice how the monster steps on the same car 3 times and seems to take forever to walk up a single street. When the Behemoth attacks the ferry watch carefully and you will see the wooden base the rubber head is attached to come out of the water! Other scenes are very good though, like the beast "attacking" the high tension wires and when he strolls by the houses of Parliament you almost cannot tell the old British landmark is just a blown up photograph! B-Western stalwart Gene Evans is pretty good as the hero and Andre Morrell, a one time Dr. Watson opposite Peter Cushing's Sherlock Holmes, is good too. Not much time is wasted on a romantic subplot . . .thank goodness! Allegedly when director Eugene Lourie's young daughter saw this film she chided her father "Daddy, you're bad! You killed the beastie." her comment stayed with Lourie and a few years later when he directed GORGO he . . .well . . .that's another story for another review. See you then.

13 of 13 people found this review helpful.  Was this review helpful to you?

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Now available on DVD!!! bob-2751
On TV last night Dicky_Hart
Would like to see Behemoth refilmed today! darthykat24
Ferry boat sinking scene ddski63
The Giant Behemoth Was On TCM, Early this Morning! opalockamishabob-1
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