* EthnicScrappy: The truly cringe-worthy appearances of black character actors Stepin Fetchit and Mantan Moreland as characters such as "Snowball" (''wince'') and "Birmingham Brown".
* FairForItsDay: As noted here, the series actually averted the YellowPeril stereotype by showing a Chinese person as a good guy, but the whole thing can still be embarrassing today.
* FirstInstallmentWins: Largely averted. Charlie Chan sequels, spoofs and homages pay little attention to ''The House Without a Key'', which in both film and prose started the Charlie Chan series (the film remains lost as of 2009, however). The "Number One Son" Henry first appeared in the novel ''Black Camel''. Keye Luke played him in the films (in the first film, they explicitly refer to Luke's role as Henry; later installments generally preferred the name "Lee" with the exception of [[WesternAnimation/TheAmazingChanAndTheChanClan the 1972 animated series]]).
* SomeAnvilsNeedToBeDropped: Biggers invented the character partly as a refutation of the YellowPeril villains who were common in the MysteryFiction of the GenteelInterbellumSetting.