This is the only place you'll find this bit of trivia about Bob (and Emily) Hartley; the Hartley's (real) apartment building's located at 5901 N. Sheridan Rd., Edgewater, Chicago, Illinois (still looks the same), and Bob's (real) office building's at 430 N. Michigan Ave. it's still there, though the facade's been changed to an all-glass one.
Penny Marshall, who's the stewardess in this episode, will become a semi-regular, later on, as Miss Larson.
Even though this was the first episode of The Bob Newhart Show broadcast, it's not the pilot. The series' pilot originally aired as the 9th episode shown. Its title? 'P-I-L-O-T'.
The title's from an advertising campaign United Airlines used at this time: 'fly the friendly skies'.