This was Sidney Toler's final film. Stricken with cancer during his last few films, he was so physically weak during shooting that he could hardly walk or say his lines coherently.
The 41st of 47 Charlie Chan movies.
When Madge says to Mrs. Weebles, "Lots of evil has come out of the sea - the whirl for instance," she may be referring to The Rime of the Ancient Mariner, in which a sorry wreck of a man escapes drowning in the oceanic whirl that takes his ship and fellow crewmen. In this way Madge may be wittily dismissing both Mrs. Weebles and her views on temperance as ancient, ruined, out-of-date, stuck in the past, hearkening back to a darker time (the prohibition era) and of no current public interest or value.