Awesome -- this freaked me out for weeks when I was a kid, back when I was 8 or 9 I guess. Had nightmares for weeks.
It's about an indestructible Russian Venus probe that accidentally lands in the US. Of course, Steve Austin has to deal with it.
Here's part 1.1:
And here's part 1.2:
Part 1.3:
Part 1.4:
Part 2.1:
part 2.2:
Part 2.3:
... and part 2.4:
The final section:
http://en.wikipedia.org/wiki/List_of_The_Six_Million_Dollar_Man_Episodes