I gave this episode a nine. The Enterprise in real trouble here, and with the crew falling to pieces at the worst possible moment. If you can keep your head while all around you are losing theirs...
Kirk really shines in this episode, struggling to save his ship and crew while the s*it hits the fan at every turn. Scotty and McCoy are as professional and reliable as ever, and my favorite Kirk-Uhura moment of all time happens here:
RILEY [OC]: Kathleen. And now, crew, one more time!
KIRK: At least try cutting him off!
UHURA: Sir, if I could cut him off, don't you think I'd-
RILEY [OC]: I'll take you home again Kathleen
UHURA: Yes, sir. I'll keep trying.
We have the Spock emotional breakdown, Kirk admitting his love for/relationship with his ship, a really great Sulu freakout, and even Janice Rand taking the helm at one point!
One of my favotites for sure, certainly in my top ten.