Guess a Classic Horror/Sci-Fi by a Description

[Memphremagog]

The Phantom of the Opera ?

That's it!

[Mike Scott]

An advanced intelligence from another planet coming to Earth with an ultimatum and out-of-this-world powers to back it up.

[Memphremagog]

The Day the Earth Stood Still

[Mike Scott]

The Day the Earth Stood Still

Nope! 

[Memphremagog]

It Conquered the World

[Mike Scott]

It Conquered the World

You were red hot, before, now you're cold.

[Lunkenstein]

THE MYSTERIANS (1957) ?

[Mike Scott]

THE MYSTERIANS (1957) ?

Missed it by 3 years! (And a lot of other  things.)

[Mike Scott]

This is kind of an obscure movie, but I figured you all had heard if it. It has been on home video. It stars someone who won an AA in the early '60s.

[Maceo1]

Stranger From Venus,  AKA: Immediate Disaster , 1954 , with Patricia Neal .

[Mike Scott]

Stranger From Venus

That's the one! 

[Maceo1]

OK...  Some rich dude invites some guests to his house, in order to uncover a beastly killer.

[Memphremagog]

THE BEAST MUST DIE!

[Maceo1]

THE BEAST MUST DIE!

Yes...very good.

[Memphremagog]

A group of shipwrecked mariners seeking survival on an island learn that you should watch what you eat....