The interior set of the Jamison home is the Stephens' living room set from Bewitched (1964) with minor modifications (no staircase) and dressed with different furniture.
Billy Mumy plays a neighbour who literally wishes he could be an astronaut. That same year, he appeared as a boy astronaut on Lost in Space.
The first episode that Tony initiates kissing Jeannie (instead of her always kissing him).
Barbara Eden tells a story about this episode, it was the first one directed by Gene Nelson and he had not been told beforehand that she was pregnant. When she found the bathing suit in her dressing room, she sent a message to Gene that there was no way she could wear it and hide her pregnancy. Not believing she could be very big, he sent a message back for her to put it on anyway. When she showed up on set in the bathing suit, he was shocked! Thankfully the device used to have her suspended in the air had enough room that when she laid on her stomach, it hid most of her pregnant belly. But the careful viewer can tell that she is very pregnant in that scene! This was the last episode filmed before her maternity leave.
Colored version was wrong, Barbara Edens bathing suit was actually red, not green in this episode.