While we're all appreciating the late Tom Stoppard, I want to throw in a good word for his under-appreciated espionage drama Hapgood. I missed the original West End production (in 1988), but was mesmerized by the version he revised for Stockard Channing at Lincoln Center in 1994.
You can find many of the same physics and math themes in his later (and much more critically successful) Arcadia, but I think Hapgood deserves to be better known than it is.

