- Dr. Sampson, the Paleontologist: Oh, it's heading for the Thames. They always made for the freshwater rivers to die. That's where their skeletons have been found - some irrestible instinct to die in the shallows that gave them birth. You know, all my life I hoped this would happen. Ever since childhood I expected it. I knew these creatures were alive somewhere, but I had no proof, scientific proof, and I had to keep it to myself, or my colleagues would have all laughed at me. See, no form of life ceases abruptly, and all those reports of sea serpents - well, what can they be?... The tall, graceful neck of paleosaurus. He can stay underneath the surface for an age, and now he comes to the top.
- Steve Karnes: [solemnly] One thing is sure. Something has happened here that isn't in the book. Something came out of the ocean and now has gone back into.
- [last lines; U.K. Version]
- David McEvoy - Reporter: [heard on the car radio] ... The final destruction of the monster in the Thames is now officially confirmed. Disturbing reports are being received from the Atlantic seaboard of America that mountains of dead fish have been washed ashore. Can this mean the beginning of further attacks by these ocean monsters?
- [Karnes and Bickford are stunned by the news]
- Steve Karnes: I feel Admiral, what we're facing is a marine animal of tremendous size and strength.
- Admiral Summers: Do you mean to believe that a whale could've smashed through steel plates so high above the water line?
- Steve Karnes: I didn't say a whale.
- Professor James Bickford: Behemoth?
- Steve Karnes: That's as good a name as any for now.
- [Jean finds her father badly burned]
- John: What happened, man? Can - Can you talk to us? Can you hear us, Tom?
- Jean Trevethan: Dad? Dad?
- Tom Trevethan: From the sea... burning, like fire!
- John: What was it?
- Tom Trevethan: Behemoth!
- 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.