Even if the acting was a little over-the- top, like it was in nearly all of the original Star Trek episodes, those two still produce great suspense and drama. If memory serves, that is the first time we learn about the Romulans and their cloaking devices. The first Borg episode of TNG reminded me of the Doomsday Machine episode, a seemingly indestructible force striking fear into p the crew of the enterprise.
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"It's nice to be nice to the nice." Frank Burns