Boom is a very Moffat episode, for better or for worse.

Sometimes, it must be said, for the worse - there were a few times you could have swapped Ruby out for Clara or Amy and would've gotten the same outcome. There was also a few too many concepts and metaphors packed into one episode,  it'd've been nice to get rid of some to let the others breathe

But GOD did it give me brain bees. The concept was fascinating, the execution was mostly very good, and Ncuti Gatwa was incredible. It was tense it was emotional it was a damn good episode