Planet of Giants was originally planned and recorded
as a 4 part adventure. However, it was decided that the story was too
long and drawn out, so the decision was made to whittle it down to 3
episodes. As a result, episodes 3 and 4 were edited together for a
final episode 3.
None of the unused footage from episode 3 or 4 exists
today.
This story marks the beginning of the second season for
Doctor Who.
Quite a bit of work, detail and money (for the time) went
into the design of this story. Many oversized props and scenery were
needed to give the story an authentic feel. While it still looks dated
by today's standards, these elements hold up better today than many other
stories produced for Doctor Who over the years.
This story also marks the first time that an adventure
takes place on (then) present day Earth.
This is also one of the earliest
"environmentally" themed stories in the program's history (which
really culminated during the Pertwee Era, 1970-74).
A new "videoising" effect (called VidFIRE) was used by the
Doctor
Who Restoration Team on this release. Originally shot on
videotape, then transferred to 16mm film for overseas sales, all 60's Who
stories have a film look to them. The new process restores the
sharper, more "live" feel of videotape (and what would have been
seen by the public when originally screened). If this proves to be a
popular restoration, it will likely be used on further releases of 60's Who
stories.
The VidFIRE process was used on episodes 1
and 2 only. Because episode 3 originally exists as 35mm film and not
videotape (for reasons too complicated to say here, check out the Doctor
Who Restoration Team site for the whole story), it was decided not to
apply the VidFIRE process to this episode.