After arriving at the planet in the Neutral Zone, Picard sends Worf to fetch Jarok. Minutes later a security ensign arrives with the admiral and Worf is nowhere to be seen. When the crew attempt to flee, Worf is back at his station.
When the holodeck simulation of Romulus is ended, the blue-screened room around Setol and Data is much, much larger than the holodeck set that the rest of the scene takes place on.
When Setol is healing in sickbay and trading insults with Worf and Riker, the boom mic shadow can be seen passing over Setol when he says, "How do you allow Klingon P'takh to walk around in a Starfleet uniform?"
The shadow is actually from Riker's arm, when he gestures for Worf to stay back after an insult. Riker's body can clearly be seen to shift twice as the arm shadow raises and lowers. There is no reason for a boom mic to make such a definite forward-stop-wait-backward motion in that scene. However, it is odd that a Romulan used a Klingon insult ('P'takh')
The shadow is actually from Riker's arm, when he gestures for Worf to stay back after an insult. Riker's body can clearly be seen to shift twice as the arm shadow raises and lowers. There is no reason for a boom mic to make such a definite forward-stop-wait-backward motion in that scene. However, it is odd that a Romulan used a Klingon insult ('P'takh')
In the "Battle of Agincourt" Holodeck program, when Data tells the computer to "freeze program", the campfire keeps flickering, and the guard's spear trembles.
In "The Enemy", Tomalak casually cruised his ship into The Neutral Zone without any repercussions from the Enterprise. Yet here, the Enterprise cruises into The Neutral Zone, and Tomalak unleashes disruptor fire on her.
In The Enemy (1989), the Enterprise had a visual conversation with a Romulan ship that was over "6 hours away" from the Enterprise. But in the beginning of this episode Lt. Worf states that the scout ship is too far out of range for a visual conversation, even though within a few moments the ship is within visual range and even able to put their shields around it.
After the Enterprise hails the Romulan Warbird, it cloaks and turns away. Cloaked Romulan ships cannot be detected by Enterprise technology. Yet, Worf identifies its course and position.
In The Enemy (1989), Tomalek's ship flies into the Neutral Zone, and Picard simply tells him how he's violating the treaty. Yet, in "The Defector," Tomalek simply unleashes his ship's disruptors on the Enterprise for committing the same act.
At 36:44, as Captain Picard turns to walk back towards his chair on the bridge, the reflection of the boom mic in motion can briefly be seen on the control panel in the top right corner of the screen just to the left of the turbolift doors.
Setol asks Data if the replicator can create a Romulan ale, and Data gives a dissertation on the options available. It is a running gag in this series that Romulan ale is prohibited in the Federation, so that various characters find loopholes around this ban in humorous ways. It is odd that the punctilious Data fails to mention the ban.
Geordi explains to Data that the phrase "catching (the Romulans) with their pants down" is a metaphor for catching them in the act. However it actually means catching them off guard. "Catching them with their hands in the cookie jar" or "red handed" would've been more apt for what he was trying to say.
In his ready room, Picard asks Data about the morale of the crew, presumably because they would always "put on a brave face" for their captain. But since Data is third in command, they would do the same with him. This inquiry would be best put to Counselor Troi.
Admiral Jarok refers to himself as "Jarok," Picard calls him "Jarok," but Admiral Haden pronounces Jarok's name as "Jirok."