Common Sense Note
Parents need to know that (generally non-graphic) violence in this Sherlock Holmes adaptation includes a dog mauling, a few shootings, and an attempted poisoning. Closing line, "Watson, the needle," is a faint clue about the notorious recreational cocaine use by Conan Doyle's hero Holmes, who in the stories called for the drug to come down from his natural "high" of solving a mystery. Watson smokes tobacco throughout; other characters drink regularly. This was the first of the Basil Rathbone-Nigel Bruce adventures; they fell into public domain and are carried on cheap video labels -- beware of inferior picture and sound quality.
A dog attack. Guns brandished and people (and animals) shot at.
Sherlock Holmes' character remains an idealization of superior intellect and problem-solving through careful observation, anticipation, and deductive logic (though he would later have strong competition from Mr. Spock from Star Trek in that department).
An entire fleet of Basil Rathbone-Nigel Bruce Homes/Watson adventures were produced after this, and there are, of course, other versions of the same characters.
Drugs / Tobacco /
Much polite social drinking. Watson smokes pipes. A blink-and-you'll-miss-it reference to Sherlock's regular recreational IV-drug use.