"Cmndr Walker, Cptn. Anderson and Lt. Col. Grey are assigned to a secret mission to the moon. Walker and Anderson land, while Grey stays in orbit. As they collect samples, they find footprints...and the body of a Soviet cosmonaut on the moon. Soon they hear weird noises and find they're not alone."
#8 Here is the full documentary of the mission....
https://www.youtube.com/watch?v=ETj8NxFe6T8