Stranger from Venus is a 1954 science fiction movie starring Patricia Neal. It is a slow-moving film with a lot of talk and little action.
Youtube has it online:
SFFWorld has a review that wonders why the folks behind The Day the Earth Stood Still didn't sue. DVDTalk's review says it "plays like a pretentious theatrical production made by people lacking the talent to come anywhere close to pulling it off".
1/9/2011: SFSignal has it as their Sunday Cinema.