NASA landed six missions on the Moon, each with a two-man crew. Therefore, the number of astronauts who eventually did walk on the lunar surface actually is twelve.
Dr. Selim Hamid:
Dr. Feodor Orloff: Praise this ship, not Allah.
As Heinrich and Ruskin's shuttle plummets to the Earth, a stick is visible extending from the left side of the screen to the model and is obviously being lowered by a stage hand (the stick actually obscures some of the stars on the backdrop).
The "starring" cast credits are shown against a background of stars. Each name seems to zoom outward from the center of the screen, like meteors in a shower; but as each one appears it stops and remains onscreen until all 12 names are visible simultaneously. Ken Clark's name is the first shown, followed in order by Michi Kobi, Tom Conway, Tony Dexter, John Wengraf, Bob Montgomery Jr., Phillip Baird, Richard Weber, Tema Bey, Roger Til, Cory Devlin, and "and Anna-Lisa"; but when they have all settled in their places, the first row of names has Clark, Baird, Dexter, Til, Conway; the second row has Devlin, Bey, Montgomery, Wengraf; and the third row has Kobi, Anna-Lisa, Weber. Francis X. Bushman's name appears on a second screen as a "guest star".