Dr Russell's opening log entry goes from 1,900 days in space to 2,500 in just one day.
The lead alien wrongly says that a butterfly only lives for 1 day - but that is actually largely true of the mayfly - butterflies typically live for a month.
During a fight on the moon's surface the commander's helmet opens with no apparent effect.
Some of the aliens at the back of crowd shots of them are clearly 2D flats. This was due to only three alien costumes made that the actors underneath wore like a tent.
When Maya and Helena are showing Koenig the recording of the launch of the Pilot Ship on the view screen in Medical, all three of them should've seen an Eagle heading into space and not the Pilot Ship, as there are currently no aliens in the room to control Helena's and Maya's minds (just as Kander had viewed the aliens on his screen in the Records Lab).
The notice by the Nuclear Monitoring Station's Cemtral Core access door contains some misspellings: In the advent [event] of an emergency press red button on side B of your comlock. The activator in the pannel [panel] on your left will then open to reveal the emergency red handle which operates the escape hatchway apparatus. Turn the handle in either direction, secondary level. Space suits can be found in lockers B1 and C2.
Maya was visibly disturbed to view the aliens as they really are, but Helena presented no reaction whatsoever, as though she were still looking at their human illusions.