Balance of Terror
There were several scenes excluded from this episode. The first cut scene is an effects shot with dialog explaining to some degree why the Romulan ship is saucer shaped with protruding nacelles. It also explains Mr. Stiles reference to spies in the televised version of the script.
INSERT - SHIP'S VIEWING SCREEN
The attacking vessel can now be seen definitely to be some modified version of a starship saucer main section... but with the dark markings on its underside which suggests a bird-of-prey with half-spread wings. And centered there is a threatening-looking "weapon tube" device. We see it in full size only momentarily.. then it launches a torpedo-like bolt of blinding energy from the weapons tube.
This next deleted scene shows the head technician sauntering back and forth observing the read outs on the control panels. The scene was most likely shortened to hasten the pace of the show.
This next sequence was to occur just before the Enterprise bridge scene when Rand enters and asks Kirk if she should continue making log entries.
INT. ROMULAN SHIP'S BRIDGE - COMMANDER AND CENTURION
The Commander looks worriedly at him - then lowers his head back onto the pillow-like armrest of the couch...
Decius approaches the Commander... His eyes glitter and he bows with eager respectfulness.
Painfully, his breath rasping in his throat, the Centurion reaches out for the Commander's arm.
The Centurion is suddenly gripped with pain... gritting his teeth not to show his anguish.
Gently, the Commander tries to comfort him.
This next cut scene is towards the end of the episode with Kirk saluting the Romulan commander.
Just before the Romulan Commander destroys his ship, Kirk salutes him.
The Commander responds with a stiffly-precise small bow.
From this point the episode continues on as televised.
If after viewing the footage it was discovered that the scene was unusable, it would be very expensive to re-shoot the scene as the set may have already
Its interesting that the Enterprise's interior set design for the bridge uses a color palette of mostly additive colors; red, green and blue, whereas the Romulan ship uses mostly the subtractive colors of cyan, magenta and yellow.
What is interesting about the Romulan dialog is its cadence, which is almost poetic when spoken.
Thanks to Dave T. for the Balance of Terrorclips.