Ballards!

Or a rather similar exclamation must be escaping O'Neil's mouth right now...

As it clearly is not over yet, with Ballard in space suit catching O'Neil and the viewing audience by surprise...

Yes a honest surprise, one of the few moments in the entire movie which is not totally telegraphed by events proceeding it, but one does have to remember this was back when the "one more scare" (as its known) tactic in mainstream movies was still relatively new....

I mean this was before Die Hard for example - just to give you an idea

And one does get so caught up in the moment that you would have to think a bit as to what Ballard's sudden appearance with murderous intent actually means...

It means that it is most likely that Ballard murdered Spota in the zero gee cell. As Ballard (being a fellow police officer) would have had access to the cells

The only other suspect was Yario, who wouldn't have such access and clearly had a thing for the garrotte

So the clue was there if you was looking for it! There was another killer looming in the shadows, who has just revealed himself

So O'Neil is up against it again - will he survive this round?

There is only one way to find out - come back tomorrow

Just two more days and we will reach the conclusion of the story....