Scotty finally gets beamed up himself

[Lucifer Box]

I was wondering the same thing. Kirk eventually mixed up some sort of gunpowder out of natural substances lying around, and shot the lizard. I think.

That's pretty much it. The episode was called "Arena".

Arena Plot Synopsis

[Bagpuss]

In bill and teds excellent adventure they are watching that episode on TV when the "evil us's" arrive and drive them out to the very same area of the nevada desert where that was filmed, and kill them.