A bell did ring somewhere but not loud enough.
However she was in the show. From Google :-
What's My Line
30min | Game-Show | TV Series (1951–1964)
What's My Line.
A panel of celebrities trying to guess what a person does for a living, or figure out who a mystery guest is. This is the version for the United Kingdom.
Stars: Eamonn Andrews, Isobel Barnett, Gilbert Harding | See full cast & crew »