I remember finding this
the least impressive story of the season when I first saw it but back then I
suppose I wanted it to have more monsters than it does. It just seemed very
talky especially at first. Oddly re-watching now I prefer the first half to the
second as it contains some interesting ideas whereas parts 3 and 4 seem to
become more of a standard base (or in this case spaceship) under siege. Less outwardly showy than it’s season
counterparts, `Planet of Evil` takes its cues from both Forbidden Planet and Jekyll
and Hyde. It shows just how effectively Messrs Hinchcliffe and Holmes- here
with writer Louis Marks- were able to filter and splice elements of classic
stories into something fresh.