Eric Peterson performed their play, Billy Bishop Goes to War. (It won the L.A. Drama Desk Award.)
Billy Bishop Goes to War is a musical based on the life of Canada's WWI flying ace, Billy Bishop of Owen Sound, Ontario. Peterson, one of Canada's best-known actors, played Bishop and a host of other characters, zipping in and out of the roles with the ease of changing a prop. It was an amazing show. I've since seen it performed in other venues, by other actors, including, David Ogden Stiers (of M*A*S*H). He was so physically different from Peterson (tall, robust, balding compared to Peterson's slight, wiry frame and red hair) that it was strange at first but it was also an excellent performance.
Gray and Peterson have been performing the play for 30 years and now they've re-imagined it, tailoring the title character to Peterson's real age. They've also filmed it. It was supposed to be released on DVD last November, but if you search for it, all you find is a paperback copy of the play. You can watch the trailer here. You can buy a copy of the play here. I am going to track down the movie.