The voice of the fair-haired NASA operative featured in the space probe launch sequence was overdubbed in post-production by Anderson veteran Shane Rimmer.
This was the episode selected for release in the ViewMaster stereo format.
The music from the spacewalk sequence was taken from the movie Journey to the Far Side of the Sun (1969).
NASA staff, while avoiding English accents, still pronounces words the European way ("missile" ""telemetry")
Near the end when Straker is in Henderson's office, there is an Action Man Mercury space capsule on the unit behind them.