Characters use "extinguisher globes" to put out a fire in Doc's home. In real life, glass globes filled with carbon tetrachloride or other fire suppressants were marketed in the 19th century. They have a long shelf life, and are now collectibles, but are only minimally effective against fires.
This was to be the first in a series of films based on a popular series of pulp novels. The poor box office returns cancelled plans for any further film productions.
According to contemporary news accounts, footage for a sequel was filmed in the Lake Tahoe area. It was never completed because of this film's poor performance at the box office .