In a bit of foreshadowing, Commissioner Gordon asks his secretary to call Barbara Gordon and tell her to take a later plane to Gotham City. Barbara, aka Batgirl, would make her debut in the first episode of the next season.
Marked Madge Blake's final appearance as a member of the regular cast. Blake's failing health along with budget cuts, resulted in Aunt Harriet being written out of the series for season three. Blake would make a pair of extended cameos, and in one instance Aunt Harriet was referenced to being off screen during the course of the third and final season.
This was the final appearance of Mr. Freeze.
At one point Commisioner Gordon talks to Gov. Stonefellow on the telephone. This is a subtle reference to the then Gov. of New York (and future Vice President) Nelson Rockefeller.
First and only appearance of the Game Room at Wayne Manor.