It was a Star Trek The Next Generation episode. A Romulan defects with news of what he believes to be Romulan intent to start a war, starting with a base being built in the Neutral Zone. The Enterprise enters the zone to investigate and is intercepted by three Type B Warbirds, also known as D'deridex class, under the command of one Commander Tomalak, played by the late Andreas Katsoulas. They demand that Picard hands over the traitor. Picard refuses. They threaten him, saying, "You will not survive our assault." Picard responds, "And you will not survive ours." Three Klingon K'vort class warships decloak, having been in squadron formation with the Enterprise the whole time they were in the zone.