Caught this from TCM's playing of "Dead of Night" (Ealing 1945) the other day. Sally Ann Howe says this very well at the end of her sequence. I saw this about 30 years ago and we can all thank Michael Redgrave for helping launch my ventriloquist-dummy-phobia.
Rod Serling swiped a lot of stuff from this picture.
Oh, and now all I can think about is the name "Googie Withers."