A priceless Cellini silver cup is stolen from a local museum with both Hildegarde and Oscar on the case.
December 11, 1936
Released
The Plot Thickens
1h 9min
—
English
RKO Radio Pictures
2007
2017
2019
1999
1994
1970
1982
2002
2016
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1979
2010
1888
1989
2006
1988
Part of
Includes: The Penguin Pool Murder, Murder on the Blackboard, Murder on a Honeymoon, Murder on a Bridle Path, The Plot Thickens, Forty Naughty Girls
