3 movies - a death ray, an alien, and spheres in the ocean

[Cody]

I'm trying to work out three different movies :)

One I'm pretty sure was in black and white, it involved a weird scientist guy building some kind of death ray in his attic, which his neighbours weren't too happy about.

The other was an alien, kind of tall with a round head, and it would throw these starfish like things that had teeth and would eat people. There was a scene with a guy driving down the road and a lot of them falling on his car, then he found refuge in a cabin in the woods...

The final movie is the one I've been looking for for the longest, nobody knows what it is! I never saw it, I only ever saw the VHS video cover in the 80s or 90s... it was a picture of 1 or 3 silver spheres rising from the ocean (on stands), with a horizontal window slit on each and people inside. I had a feeling it was a disaster movie. But I've been through all of IMDB looking for that (and I also thought it had numbers in the title but I went through ALL the numbers-in-title movies, and didn't find it).

These were all in English. I live in Australia. Any takers? :)

[Andrew]

#2 is almost certainly "Without Warning" (1980)
 
IMDb entry:
http://www.imdb.com/title/tt0081764/

Can you describe more of the first?  Any specific characters, time period it was set in, when you saw it.

[Cody]

I'm hoping my details from memory won't embarrass me :)

I saw it in the mid 80s on VHS. I remember it was an old-style house in a suburban setting with the scientist (Doctor something) building a death ray in the attic. I think he was pointing it at the street to kill people, and it ended with someone going up into the attic and wrestling with him trying to destroy it.

It was fairly serious though perhaps a little campy. He may have had something to do with Nazis but I don't think they played a role in the movie. I can't be positive it was black and white, but I think it was.

I'm trying so hard not to mix this up with Honey I shrunk the kids. Hehe.

[Cody]

3rd one is Holocaust 2000 (1977)! I can't believe I finally found it! So, just the death ray one to go ...

[RCMerchant]

The first one sounds like the SECRET OF DOCTOR MABUSE (1963).

http://www.imdb.com/title/tt0058667/combined