It's the irksome lingering questions that tend to derail 'The Trap' for me, despite nice touches here and there. The Mysterons' plan involves wiping out the leaders of the World Air Force who are congregating in a remote Scottish stronghold. In order to do so, they kill (and replicate) one of the Commodores as a Mysteron presence inside the castle (where Scarlet and Symphony have also been taken captive). But if the Mysterons know the location of the meeting (or at least what plane to take over to get that information), why not just use their magic powers and blow up the castle, killing everyone in one fell swoop? And if Rhapsody suspects the XQR actually went down (as it did) then why not have Scarlet on hand with a Mysteron detector to stop the attack before it happens? I dunno, for such a huge operation, the Spectrum organization seems questionable.
Putting those aside, all of this goes down at Glen Garry castle, which is a pretty amazing model; and the interior sets are some of the more lavish on this show. The Mysterons expand their array of powers (oh man, they can mimic voices like the Terminator!) and try to settle the score by shooting down a chopper with a gatling gun. It's these little things and the tension when Scarlet's captured that I like, but the gaps in logic make you leery of Spectrum's methods.
6/10