She was the Orion nutjob from "Whom Gods Destroy," who had figured out a method to ensure permanent male fidelity ("he is my lover, and I have to kill him"), played by Yvonne Craig. <Dr. Rumack, from
Airplane>But that's not important now.</Rumack>
I really have trouble, at least at the beginning of the episode, believing Cillian O'Sullivan as, well, the template for the Roger Korby played by Michael Strong.
On the other hand, I can
totally believe Rhys Darby as Trelane, and though I'd heard something about him showing up, and turning
Korby into a
dog, I wasn't expecting it to happen so soon. And as soon as I realized that this was a comedy, and that it was somewhere in the gray area between cornball and screwball, I also realized that "Rule of Funny" trumps both logic and continuity.
Still, at times, it seemed a bit stretched, making me wonder when "Dad" would show up and put an end to it.
Still, it begs the question of there being little or nothing (other than different hair and a different coat) to explain why Uhura or Spock wouldn't recognize Trelane only a few years later in "The Squire of Gothos." Or why O'Sullivan's Korby neither looks nor sounds like Michael Strong's Korby.
I gave it a 7, deducting a point for the continuity trouble.