I wanted an explosion of Spock's thoughts and knowledge. So it had to be big in order to convey that. The idea came from watching hours of Monty Python's Flying Circus, as a kid.
Flint is 6,000 years old, but appears around 60 to us. The actor playing him was anything but god-like, but did look around 60. I wanted to convey his confidence and strength in his stance and his stare. A cartoon or animated pose was a good way to express those features.
In the episode, Flint shrinks the Enterprise down in order to keep her crew from leaving and telling the universe about him. I thought it would make a good visual if Flint were holding it. It shows off his power and makes him more god-like than if he were empty-handed.
It started out actually as an old 40's serial poster. The serials had posters with the chapter or episode numbers on them. It ended up having more of a 70's punk band feel, with the lack of background color and collage elements.
"Assignment: Earth" was a backdoor pilot for what would have been a new TV series, created by Gene Roddenberry, that was never made. Garr and Lansing would have both starred in it. My guess is it would have been an American version of Dr. Who. The Desilu logo on top was in keeping with the serial theme.
I wanted something bold yet recognizable. Capt. Pike in his chair is well known to fans and it's an image that evokes a sense of sadness and horror.Commenting on the guest star credit:
I felt that Jeffrey Hunter deserved credit for the integrated scenes from "The Cage," which he had starred in.