The voice on the radio is performed by Frank Terry. He is also on screen playing Hives, Mr. Hardy's butler.
Squad car 49 receives a message to go to '6311 Old Fashioned Way' This was a reference to the W.C. Fields film The Old Fashioned Way (1934).
The picture on the jigsaw puzzle is 'White Feather' by R. Atkinson Fox in his collection 'Indian Maidens'.
Preserved by the UCLA Film and Television Archive.