This was lovely episode. First O'Neill in is very natural environment - saving the day, doing all the heroic things. And it was so great to see - that problem with underwater controls and the way they fooled that Woolsey. It was genial. And he was not the only one, saving the day. Beckett got little of that as everyone else - they managed to make a false plan and built a trap for those nasty replicators. And I think they will have their city back in not too many damages.
All the motion, the plan things.. the little humor they had always around. Action. Super episode.