Fantastic episode! This is how you end a mid-season cliffhanger. Well done, all around, this one gets a 10/10 from me.
* Like some others, when Lorca turns as the Ship of the Dead is exploding, "cool guys don't look at explosions" ran through my head.

* I knew Stamets was doomed the moment he talked about one final jump. When you do that, you might as well cash in on that insurance policy you filed when christening your boat, the "USS Live Forever."
* I loved the kiss between Stamets and Culber. Loved it. ♥
* Yeah, if Tyler isn't Voq, I would be surprised. Still, I'm looking forward to how this plays out.
* Yeah, yeah, I'm 12, but first actual sex scene ever in Star Trek. Finally. And it only took 50 years.
* I loved the spore drive being used to gather location data in an effort to break the Klingon cloaking system. Rather creative, IMO.
All in all, a great episode, a great cliffhanger, and I can't wait to see more.