Fans of Star Trek: The Next Generation are very familiar with the deep, resounding voice of Patrick Stewart. It’s coarse, like weathered leather, and has a sophistication to the pitch and diction that make it challenging to get right. For co-star Brent Spiner, he can fool (for a time) just about anyone, even Stewart’s wife. Here his is at Comicon, 2011. The video quality is poor but the sound is good enough to hear the expertise associated with the impression. …