When Kurt is evaluating Sister Andrea, she recounts the first time she had a vision: "When I was 15. I was playing the piano, the heavenly chords. E, C, D, G, B--with the right; A, F, G, C, E--with the left. And a presence materialized. . . . St. Bernadette, holding a vase with roses. And every time I hit the chords, she appeared, and then she would fade with the notes. That's when I gave myself to Christ. That was the day." As she recites these lines, the actress playing Sister Andrea, Andrea Martin, sings each note in turn. Martin, whose role on Evil otherwise affords her few chances to use her singing voice, is a Canadian-American comedian who is also well-known as a musical theater performer. Early in her career, she was in the cast of the legendary 1972 Toronto production of Godspell, which also launched the careers of Gilda Radner, Eugene Levy, Victor Garber, Martin Short, and Paul Shaffer. She has won two Tony awards (Broadway theater's highest honor), for the musicals My Favorite Year and Pippin.
Annie Golden, who plays the bit role of the diner waitress in this episode, is well-known as a professional singer and musical theater performer. She first came to public attention as the lead singer of the punk band The Shirts. She also has had numerous roles in musicals, starting with the 1977 Broadway revival of Hair (she was also in the 1979 movie version). Other Broadway shows have included Leader of the Pack, On the Town, The Full Monty, Xanadu, Violet, and the 2022 revival of Into the Woods; and she originated the role of Lynnette "Squeaky" Fromme in the off-Broadway premiere of Stephen Sondheim's musical Assassins.