Lt. Ford tells Straker that the UFO has an E.T.T. (Estimated
Trajectory Termination) at East Anglia. This is a region of
the United Kingdom. Later, Ford narrows the E.T.T. to
Norwich, a city within the East Anglia region.
On page 8, the UFO is described as descending to the ground
like a sycamore seed. The common UFO in this series spins as
it moves; sycamore seeds spin as they fall to the ground as
The photos on pages 8, 9, and 12 are from the episode
The UFO is damaged by cannon fire from a Mobile on page 9 and
spews purple and black, then yellow and green, clouds of
smoke. In "Identified", a UFO spews orange smoke after being
struck by fire from Sky 1.
The narrative of this story explains that four UFOs have
attempted to get past SHADO defenses in the past week, an
unusually high number.
Page 10 suggests that, after a crash-landing, a UFO can
destroy itself, leaving no trace of the vessel or its
The photo on pages 10-11 is a scene from
"A Question of
On page 12, Professor Stobart is reading up on the latest
developments in transplant surgery and Freeman refers to him
as a professor of medicine and advanced sparepart
(artificial or transplanted organs) surgery. Since the
professor was targeted for abduction by the aliens, it may
be that his skills and knowledge of transplant surgery were
wanted for making use of human organs in their bodies (which
"Identified" suggests is the
main reason for the aliens' visitations to Earth).
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