Arcadia
Two timelines in the same English country house: 1809 and the present day. A teenage girl in the past anticipates chaos theory and thermodynamics. Researchers in the present try to reconstruct what happened and get everything wrong. Stoppard's best play is about the arrow of time, the limits of knowledge, and the way the waltz keeps going even as the universe runs down.
Stoppard rations the feeling until the final waltz; before that you get two hours of very good seminar. Characters explain iterated algorithms, the second law of thermodynamics, and Romantic scholarship to each other, and Thomasina's precocity exists because the structure requires a genius in 1809. Bernard is a cartoon of academic vanity. On the page, without actors, the wit can read as lecture notes with timing.
The case for it and the rest of the canon open with Pro.
