The commander of the Protoss Arbiter occasionally says, "Duras!" and "Gowron!"
When clicked on repeatedly, the pilot of the Protoss Corsair says, "Zefram Cochrane... is that you? What did you do to your hair?"
When the commander of the Terran Battlecruiser is given an order, he sometimes says, "Make it happen." or when clicked on, "Hailing frequencies open." When clicked on repeatedly, he says "Shields up, weapons online! Not equipped with shields? Well then, buckle up!" He also says, "Number Two, I have to take a Number One."
The commander of the Terran Science Vessel says, "Ship... out of danger?"
The Medic unit (in the Brood War expansion) says, "Please state the nature of the medical emergency". When clicked on repeatedly, she also says, "He's dead, Jim".