I always thought "Monster Zero" (along with the one after, "Godzilla vs. The Sea Monster") was a bit underrated in the Godzilla film list. King Ghidrah makes his second appearance, and it is a lot more fun and interesting than his first ("Ghidrah The Three Headed Monster" from 1964).
This definitely isn't the fastest moving Godzilla film, but there are a lot of cool things to look at as the plot goes along slow at times. And the alien invasion/takeover plot is pretty decent if not overly original. The aliens look pretty cool and their hardware is 60's sci-fi retro, you gotta love it.
Nick Adams is pretty decent enough and gives the film a certain flair. It's a shame he had to leave us so soon, as it would have been a blast to have him return in a future Godzilla film.
The special effects are totally mid-60's Godzilla, with all the obvious miniatures being stomped on by the guys in the monster suits. There's one great shot where a doll of an astronaut gets lowered onto Planet X via an open elevator outside the spaceship, and as the doll is lowered to the ground in one lengthy camera shot, you can't help but laugh a little realizing that there was no attempt whatsoever to make that shot look real, or to hide the fact it's so fake with quick silly editing. But that's part of the charm of the early Godzilla films.
I always thought it was odd when, on Planet X underground, as the leader shows the astronauts the screen showing Ghidrah wildly attacking on the surface, that Ghidrah is in essence attacking nothing but rocks and dirt because that's all there is on the planet's surface. And also how Ghidrah flies past that huge painting of a planet in the distance a few times.
Godzilla and Rodan eventually save the Earth and that's what it's all about in a 1965 Godzilla film. Godzilla by this time was definitely all hero protecting his home planet. It's such a shame that unless a movie looks like a silly music video, so many kids won't watch it. Hopefully a lot of parents are introducing their kids to these old Godzilla films via DVD and video, because they sure aren't on TV much anymore.
