In 2526, 8 Earth paleontologists and geologist were investigating a fossil find in a newly discovered case when 7 of them disappear. The only one who seems to have got out is Professor Kyle. She accompanies Lt. Scott and his troop of soldiers into the unmapped caves to see if they can find her colleagues. What they find however is the Doctor and his traveling companions Nyssa, Adric and Tegan who have also just arrived in the TARDIS. They're near the location where the scientific expedition was attacked and Scott suspects the Doctor. There are others in the in the subterranean structures however. Written by
Did You Know?
The cast didn't enjoy working with the director Peter Grimwade
. According to Peter Davison
, he didn't enthuse anyone. However, writer Eric Saward
has said that Grimwade did lift the production by directing it with pace and a good visual eye. Steven Moffat
has singled this serial out as a "really well directed show" from the series' original run which pushed the limits of what could be done in a multi-camera studio. See more
When the troopers are in the caves, the two dark figures in background walk past (to the right) and one of the troopers stops and turns around. As he does this the shadow of a crewmember can be briefly seen on the left wall. This is not the dark figure's shadow because they have already walked past. See more
[the androids attack
Who are they?
Androids. That's why they didn't register on your scanners.
[to the Doctor
Are they yours?
No. And if you want proof you'll find they'll kill me as willingly as they'll kill you.
[one of the androids fires at them and they duck behind the rock. Seconds later, the Doctor looks over the top of the rock again
See what I mean?
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