Did you see Star Trek 6 The Undiscovered Country in Canada?
Apparently, the version of ST 6 shown in U.S. theatres was not the same as the version shown in at least some Canadian theatres. I saw it in Edmonton. The difference in the versions involves Col West played by Rene Auberjonois from Deep Space Nine. When I saw it, I remember West telling the President how he can rescue Kirk and he had several big sheets of paper with diagrams that he was using to explain his idea. He then said “We can clean their chronometers”. At the end of the movie, a klingon assassin is about to shoot the president when he’s shot by Scotty. His klingon mask is then pulled off, revealing West as the assassin. It seems that in U.S. theatres, the West scenes were not shown. Apparently, the version with the West scenes is called the Director’s Cut. My blu-ray from 2009 does not have the West scenes. How do you remember the movie when you saw it in the theatre and where did you see it?