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
1944
2018
1965
1968
2011
2015
1966
1896
1997
1955
2017
1992
2013
1931
2012
2002
1984
2023
2016
1999
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
