70/80s alien movie

[gray alien]

Hello, i need to find a propably 70's or early 80's judging from it's aesthetics alien horror film. I watched a part of it when i was little, from what i remember the alien had a human form (or entered a human body, i don't remember), until he enters a device emitting blue light (wich was in his house) , where he takes the alien form. The alien was a rather typical gray alien with black uniform, but the head resembled a bit the head of the fly (the 50's movie) if i recall corectly. There was also a "pill" or something, which if humans touched it, a dark slime was generating from the pill and covered the hand with pain.  That is all i can recall, does anyone happens to know the title of this?

[gray alien]

I was hopeless, but guess what, i found it!, thanks to youtube 

The name of the movie is Time Walker.

The alien wasn't disquished as human like as i thought, but...as a mummy 

anyway here is the scene i was talking about (don't watch it, if you plan to see the movie as it is the final scene)
http://www.youtube.com/watch?v=GB1_zASDMTQ