In the end of the Romulan Episode mission "Turning Point" where subcommander Nadel tries to explain how you can either team up with the Federation or the Klingon Empire. This dialoge is abruptly interrupted by Martok screaming his head off about how the Hurq are attacking.
It's actually quite hilarious.
Both Nadel and Martok's voice line that overlap starts with "The time has come". So most likely it's an issue with the files for the voice recording starting with the same name or something.