When Koenig wakes up in Medical after Helena is abducted, the first frame of the shot shows the medical notes by the side of his bed (which Mathias reads while Koenig and Bergman talk). The text reads "Moonbase Alpha Autopsy Report".
Koenig tells Alan to cut the engines, although the switch is clearly on his side of the cabin (when Koenig operates the gravity shield switch above, he uses his left hand, so it is on his left side).
When Helena is transported into Main Mission, there is a reaction shot of Tanya. The same shot appeared at the start of the episode when Ted Clifford went to the computer. Then the doors to the Command Office were open, but in the later sequence they are closed.
When Helena is typing on the computer, one speeded-up close up is flopped left for right- note her right sleeve is white, and the ring is on her left hand.
Victor has a photograph of the Andromeda galaxy on his noticeboard. The large elongated blob in the middle is M31/Andromeda itself while the small bright spot directly below is M32, a satellite galaxy. It seems M110 (another satellite galaxy) is faintly visible at upper right. This image shows the position of the supernova S Andromedae. Thanks to Marcus Lindroos
A small photo of Skylab can be seen on Victor's noticeboard, taken from the departing Skylab 2's final fly-around inspection on June 22 1973. The single solar panel and parasol solar shield, rigged to replace the missing micrometeoroid shield (damaged during launch), can be seen. Thanks to Marcus Lindroos.
The third and final Eagle is shown twice with the tube to starboard. It launches with tube on the portside.

Not from the actual episode- this behind the scenes shot show the actors behind the Eagle control panels. There is a microphone on the top and studio light top right.
Copyright Martin Willey