Final appearance of Ellen Hartley.
William Redfield who played Gorden Borden would die 6 months after this episode's airing.
Howard's flying freight again, instead of passengers; one of his telephone messages is an alert for an upcoming shipment of prunes to Topeka.
Bob Newhart mentions King Kong; his first breakout phone-bit was about a worker at the Empire State Building calling about a giant ape climbing the building.
The title character is played by William Redfield, best known as Mr. Harding opposite Jack Nicholson in One Flew Over the Cuckoo's Nest the previous year, had played Arthur Hoover, the head of Bob's apartment meetings in Season 1.