I enjoyed "The White Iris" and they've definitely got the Classic Trek look down. I thought Chuck Huber was really good this time around. Haberkorn's Spock is probably my favorite outside of Nimoy. Vic is great as Kirk as always.
Having said that, some of the story elements just didn't ring true to this Classic Trek fan.
1. Only Kirk has the code? Not seeing it. Spock would've had a back up in case the captain got sick, died suddenly, etc.
2. Kirk would've said something to McCoy after the first or second hallucination. Something like:
Kirk: Bones, is it possible that (fill in drug name) could cause hallucinations?
Bones: I suppose so....anything you want to tell me?
Kirk: I saw someone I haven't seen in a long time today. Someone dear to me who I lost.
Bones: Anythings possible Jim. You took a blow to the head, had it treated with an experimental drug. Who knows what that could do to a man. I could run some tests, see if we can find an answer.
Kirk: Not just yet Bones. We're in a critical situation and time is of the essence.
Bones: Jim....
Something like that.
3. A ship like the Enterprise would certainly have a psychologist, but giving that person as prominent a role as they have is a bit too TNG for me.
4. The holodeck? Seriously, this element is too TNG for me. I don't care that the non-canon TAS had something like that, the holodeck is heavily associated with the TNG era so it's inclusion is jarring.
Aside from those minor nits, I enjoyed the story and look forward to more. As much as I like the call backs to previous episodes, I'd like to see some episodes with none. They've got us hooked, now it's time to forge ahead and make their own path.