ABC originally broadcast this episode in black and white.
The title refers to "The Untouchables", a group of U.S. federal law-enforcement agents, led by Eliot Ness, who, from 1929 to 1931, worked to end Al Capone's illegal activities by aggressively enforcing Prohibition and tax laws against Capone and his organization. In their conduct, they became legendary for being fearless and incorruptible, earning the nickname "Untouchables".
The only time Betty's purple convertible is shown.