Pennebaker’s documentary invaluably captures an ongoing creative process as the original cast from the seminal Company (music and lyrics by Stephen Sondheim, book by George Furth, directed by Harold Prince) convene to record the album—while they are still starring on Broadway in the show. In performance and magnetizing everyone’s attention, as ever, is Elaine Stritch. (Origin Stories: Greta Gerwig’s Footnotes to Lady Bird)