During the scene in the ballet theater, two Soviet Army officers bearing flashlights search through the audience looking for a doctor. They shine their light on Sutherland and apparently identify him by his epaulets as a medical corps doctor, but in fact, the epaulets indicate nothing but his rank as a colonel. A medical emergency in such a situation would have been addressed in the usual manner - by a public notice over a loud speaker.
The city presented as Tallinn has a completely different geography than the real Tallinn; the area around the town is flat land.