When Mandy Patinkin met Patti LuPone, it was love at first sight—the theatrical kind. Both were in their twenties and starring in the 1979 Broadway premiere of the musical Evita. In 2011, LuPone told New York magazine’s Vulture: “I think both of us realized how scared we were, and Mandy really became my rock, my ballast, my strength, my focus.” The pair have reunited for An Evening With Patti LuPone and Mandy Patinkin, at the Kennedy Center February 18 through 23. Here’s a pre-show cheat sheet.