I would like to know why the Gorn was there too, but the Gorn didn’t notice Spock boarding and so there’s no reason to believe Enterprise would have notice a Gorn boarding. It’s also possible it was beamed over when the Cayuga was destroyed to find something or to access the ships systems.
Overall, I really liked the overarching plot, but I think they needed to extend out the conclusion over more episodes with this episode and the previous feeling a little rushed.
That being said, still a very enjoyable episode and
spoiler
yay captain Boimler!
Feels like a lot of character development this series.
I enjoyed the TWoK references though!