The Chimeron princess, Delta (Belinda Mayne) is on the run from the infamously wicked Bannermen, headed up by Gavrok (Don Henderson).
A couple of bumbling CIA agents are thrown into the mix for no good reason, but beyond that Delta And The Bannermen is an insubstantial, chase story; heavy with an overpowering musical score and feeble attempts at silly humour.
Rather prophetically, the story also features several elements that still grate with me in the new Who, such as alien races obsession with Earth and its history, stunt casting (in this case, a small - and harmless - cameo from Ken Dodd) and soap opera sub-plots about character's personal lives.
On the other hand, there's an interesting throwaway line or two about bees that I wonder might have laid the groundwork for one of the through lines in the most recent year of new Doctor Who stories.
Even at three episodes, the plot of Delta And The Bannermen is seriously stretched to breaking point, and probably could have been dispensed with in two.
It's a fairly decent story with a strong central performance from McCoy, as his Doctor's sinister side starts to show through, and even Langford - when not screaming - is bearable.
However, the performances of some of the supporting cast (e.g. the totally wooden Belinda Mayne) leaves a lot to be desired and the plot doesn't so much have holes as by-passes.
For instance, the cavalier interaction between the Earthlings and aliens is very far fetched; everyone just accepts Delta, The Doctor and The Bannermen are aliens, with alien technology, and accepts it as an everyday occurrence.
The sub-plot about Ray (Sara Griffiths), who could have been the "Ace" character that The Doctor needed in his life, and her sweetheart Billy (David Kinder) descends into farce when she doesn't seem that bothered that he has transformed himself into a Chimeron and run-off with Delta. At least Ray got his vintage bike!
But the most annoying thing about Delta And The Bannermen is the music. I love 50s rock'n'roll as much as the next man, but the score for these three episodes is simply too prominent, and often in totally the wrong place or wrong tone. I certainly could have done without the repeated "comedy"/Benny Hill-style ditty for the numerous motorbiking scenes.
And just who are The Bannermen anyway? Every alien - and Mel - is afraid of their name, but no one actually explains who they are...