An outstanding Broadway success, this ingeniously devised thriller builds steadily in menace and suspense until the final, breath-stopping moment of its unexpected, "twist" ending. "A most superior thriller…which from its first blood-curdling scream to its last charming surprise is a first-class example of its genre." —NY Times. "…Miss Fletcher knows exactly what she is doing, goes about her business with gratifying swiftness and comes up with a finish worthy of one of Roald Dahl's little nifties." —NY Daily News. "The call for a good American mystery melodrama was answered last night…fulfills all the requirements for an evening of satisfying menace and mystification." —NY Post.