Karen Heck (Sister Berthe) The Sound of Music marks Karen’s debut at Curtain Call’s Kweskin Theater. Last Spring, Karen played Letitia in Agatha Christie’s A Murder is Announced at the Dressing Room Theater. Other roles include the Girl in Date Night with the Armonk Players and singing in the review Sondheim on Screen for ARC Stages, Pleasantville, NY. It’s a joy to be part of the Curtain Call “family”.