MYSTERY GUEST: Sal Maglie [MLB pitcher]; Ann Miller [film actress] PANEL: Dorothy Kilgallen, Phil Rizutto, Arlene Francis, Bennett Cerf. Whats My Line ? - Sal Maglie; Ann Miller; Phil Rizutto panel Oct 7, 1956. MYSTERY GUEST: Sal Maglie [MLB pitcher]; Ann Miller [film actress] PANEL: Dorothy Kilgallen, Phil Rizutto, Arlene Francis, Bennett Cerf. Whats My Line ? Dancer, singer, and actress Ann Miller was the mystery guest on the Oct. 7, 1956, episode of the popular panel program Whats My Line?. Host John Charles .