– (1966) – A space crew bound for Mars picks up a green woman who has an appetite for plasma. A dorky experience that explains too much through assumed dialog and not nearly enough through direct action. The female-alien-breeding-eggs motif is a prelude to Alien films, but this dud certainly didn’t influence their excitement.
– (1965) – Visitors to a barren planet discover secrets that turn them against each other. Some of the production aspects obviously influenced Alien, which is commendable, but the characters and story are rather bland as there’s a distinct lack of heroes and villains. Too serious to hail as goofy, yet too empty to hail as a wholly competent.
– (1988) – A bloodthirsty alien with a human persona could spell the conquering of mankind. Sometimes copies the original verbatim, sometimes invents its own corn, and sometimes uses scenes from other movies. Has a lot more sleaze this time, and incredible eye candy in a legal Traci Lords, but ends on a similarly lackluster note.