When the Interceptor pilots are shown swinging into their launch tubes after the opening credits, three Caucasians are shown yet it is Lt. Mark Bradley, a black from the West Indies who is shown as the flight leader.
Frank Craig, the co-pilot on the moon shuttle, is referred to as both Captain and Lieutenant.
When Foster fires the pistol in Moonbase Command, the smoke just hangs in the air. At the time all the air in the module was escaping thru a leak, the smoke should have gone straight out the hole.
When the Moonbase Shuttle begins a steeper angle of approach to avoid the UFO, one can see an Alien limpet craft attached to the underside. This scene is taken from 'Conflict'.
At 46 minutes, when Straker & Foster are fighting, Straker pushes Foster against the door and a few seconds later Foster pushes Straker against the same door. In both instances you can see the door move.
(At about 2:40) Lt. Barry tells Lt. Ellis that the UFO's approach speed is "SOL Zero Decimal Four" (0.4). Lt. Ellis then gets on the radio and incorrectly reports to SHADO Control that the UFO's speed is "SOL Four Decimal Zero" (4.0). Lt. Ford then announces that the UFO's speed has increased to "SOL Zero Decimal Six (0.6).