Kidman beats up the motorcycle gang to the same music that Alex and his droogs beat up the rival gang in "A Clockwork Orange", as the style in which the fight proceeds is quite similar to the fight in "A Clockwork Orange" as well. Also one of the gang members in "Moonwalkers" and one of the gang members in "A Clockwork Orange" (Billyboy) are quite alike.
It sounds like a rather large operation. How are we going to keep this secret?
Colonel Dickford: We'll do what the Egyptians did.Bury the architects inside the pyramid.
When Kidman is being given his initial brief, he is told that "In a few days' time we launch our 11th mission to the Moon". However Apollo 11 was not the 11th US Moon mission in that program, previously only Apollo 8 and Apollo 10 had gone to the Moon. Prior to that, the US had sent 6 Ranger lunar impact craft that were partly or fully successful, 5 Lunar Orbiter missions - all successful, and 7 Surveyor landers of which 5 landed successfully.