This episode marks the first appearance of Scarecrow in "The New Batman Adventures". He is given a new, more horrifying appearance and is voiced by Jeffrey Combs, replacing Henry Polic II.
The auditorium where Scarecrow's "Never Fear" seminars take place looks like the Pan Pacific Auditorium, on Beverly Boulevard in Hollywood, California. It's a classic example of "art deco", which was the inspiration for the "dark deco" look of Batman: The Animated Series (1992). The auditorium is best known for its appearance in the movie Xanadu (1980).