 The dentist scene in this film was originally intended to take place  in a barber shop. However, Alfred Hitchcock (I) (qv) saw the film  _I Am a Fugitive from a Chain Gang (1932)_ (qv), in which there is a  scene exactly like it, so he changed it to a dentists office.  The film was originally intended to be another film in the Bulldog  Drummond series entitled "Bulldog Drummonds Baby". However,  Alfred Hitchcock (I) (qv) and writer Charles Bennett (I) (qv)  did not get the rights to use the Drummond name.