- Director George Pal was a close friend of fellow animator Walter Lantz, ever since Lantz did some cut-rate Woody Woodpecker work for Pal's Destination Moon (1950). As tribute, Pal tried to include Woody Woodpecker references in all his subsequent films. In the scenes where the Eloi are having a good time, every so often you can distinctly hear the "Woody Woodpecker" laugh.
- Also, during the air raid scene, as all the people rush into the shelter a little girl crossing the street stops to pick something up that she dropped. When she does, you can quickly see she picks up a small Woody Woodpecker figure
- The plaque on the control panel of time machine reads "Manufactured by H George Wells."
- The "lava" in the volcano scene in downtown was actually oatmeal with orange and red food coloring spilled onto a platform and slowly moved down the miniature set.
- The costumes that the air raid wardens wear just before the nuclear attack are the same ones worn by the crew in Forbidden Planet (1956).
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