[1][2] The episode introduces Colonel Paul Foster (Michael Billington), who was to become a regular character for the rest of the series.
While the co-pilot Jim is killed, the pilot Paul Foster (Michael Billington) survives, temporarily blinded.
After waking in hospital and regaining his sight, Foster claims that the cause of the aircraft crash was a UFO but his superior at his employer Ventura Aircraft and an RAF investigator, Dr. Douglas Jackson (Vladek Sheybal), do not believe him as evidence, showing Sky One but no UFOs, points to pilot error.
Straker agrees to meet Foster at the Harlington-Straker Studios that are used as a cover for the secret SHADO Control base located beneath.
[1] Review website anorakzone.com describes the episode as "functional but decent" and "watchable stuff – although, unlike the best of UFO, there's never really any sense that the story will go in an area you didn't expect".