Help me identify a 80's (probably)series with a robotic(or alien) face attacker

More from my memories: the "face attacker" kills people, has miniature needle inside it, and leave silver(hope so silver, we had a B&W television then) colored, vein like pattern on the victim's face. The TV show begins(or ends) with moving forward in a metal tube, while you see the credits. Probably it was on Sky Channel. Sry I was 5-6 years old, thanks for every help.