Production Guide
Observations: The Immunity Syndrome

When Tony fires at Koenig the second time, the sound is slightly earlier than the laser effect and explosion.

The scans of the Maya creature from Space Warp can just be seen.

The Eagle cockpit is equipped with the space warp detector (from Space Warp). It also has the nuclear bomb controller from Space Brain.

The operator of the thermal lance dies in this episode (actor Harry Fielder; he was the guard named George in Seance Spectre). He is resurrected in the next episode, The Dorcons, as a medic.

Abruptly, people start holding their commlocks in a different way than normal. It turns out this is prudent. Incidentally, this and The Rules Of Luton are the only two Year Two episodes in which close-ups of the commlock screen are shown.

The top of the sky backdrop can be seen top right (thanks to James. C). Note that the dead Alphan who they had been examining a few scenes earlier has gone.

Two brief shots of Koenig during the crash are reversed left for right. Note his badges are on the wrong side. They seem to be outtakes from the crash scene in Devil's Planet. Thanks to James. C

As Koenig is carried from the Eagle crash, Alibe stumbles briefly.

There are subtle differences between the model glider and full sized set. The full sized glider has side wings immediately under the cockpit windows, and they are strongly curved. The model glider side wings are further forward and flat. There is a black "O" and a white triangle outline behind the wing on the studio set, but they are not present on the model.

Although corrosion causes the commlocks to explode and Eagles to disintegrate, it doesn't affect stun guns, or the buckles and zippers on Alphan uniforms. The alien communications device presumably does not contain metal parts.