Enjoyed this episode.  Agnes Moorehead one of my favorites also. I like the way it was done at the end you didnt know if Stewart or Mrs Camby went down the stairs. 

Agnes Moorehead did a superb job and its an amusing mystery story. However, Leon Janney's character; Stuart Winfield; coughed too much in ACT 3. Other than that, it was a splendid Pilot episode for CBSRMT. Check this episode out, everyone! 

Very Suspenseful.