In Mission Impossible 5: Rogue Nation, one of the main action scenes takes place at an opera in Vienna, during a representation of the opera Turandot from composer Puccini. This scenes features one the most famous theme of this opera, Nessun Dorma. It's a very famous theme that probably evokes something even for those (like me) who doesn't listen much to classical music.

At the end of the movie, during an emotional moment, the same theme can be heard in the soundtrack of the movie itself, although timidly. Here are two YouTube links with the corresponding timestamps so that you can compare:

• Pavarotti - Nessun Dorma (1:06 in)
• Rogue Nation Soundtrack-Track 17-Finale and Curtain Call (45 seconds in)

I find this is a really nice touch from the film soundtrack composer Joe Kraemer.