IIRC when the Enterprise was able to take a peek at the Romulan bridge and saw all those pointed ears, every eye was on Spock.
The Romulans talked like ancient Romans, that was a hoot (Romulus & Remus, anyone?) and their invisibility device was called “cloaking”.
Loved the ending when as the dying Romulan ship spun slowly about, their captain opted for mass suicide.
That Romulan captain, played by Mark Lenard, would also go on to play a Vulcan. He was Sarek, Spock's father.