I also enjoyed this episode, despite the fact that Rick and TC didn't really have major roles. I also prefer the Jaguar as "Robin 2" as opposed to the Audi. This episode is virtually flub free with the exception of one rather curious or shocking flub.
The flub I am referring to occurs after Magnum has finally made his way into the study. Just prior to the flub, we see Higgins being held captive by Victor and his thugs and they are about to burn Higgins' hand with the flame. As they force Higgins' hand closer to the flame, Higgins narrates, and specifically says "As they moved the flame closer to my hand I began to recognize the feeling I hadn't had since my combat days... a numbing sickly sweet feeling slipped through me."
AT THIS POINT Magnum takes over the narration where Higgins left off (you can see Higgins' narration was from the typed page), and the scene cuts to the typed written page Magnum is reading/narrating from. The rest of the page Magnum is reading/narrating from specifically says "But if I could stall them, I could buy my old friend some valuable time."
THE FLUB OCCURS when Magnum begins reading/narrating, and instead of reading what was on the page before him (beginning with "But if I could stall them...), he added "I knew I had no information to give them"
and then continued with what was on the typed page. Where did the "I knew I had no information to give them" come from?
This is surprising because his narration adds words that aren't on the typed page he is supposedly reading from.
In short, Magnum's narration differs slightly with what is actually on the typed written page. I imagine that the narration was added after this scene was shot.
There is a possible second flub, but it is too close to call. It occurs after the funeral of Sir Alec, when David approaches Higgins and shakes his hand, which is supposed to take place in 1976. Just as they shake hands you will see a car, which I believe is a Cadillac Seville drive away. At first glance I thought the car was more recent than 1976, however, the Cadillac Seville did have the body type as shown in the scene with Higgins and David from 1975 through 1979. So, this one's anybody's guess. For the sake of argument, I will say this is not a flub as there is not enough evidence to show that the car is a 1977, 1978 or 1979. You would think that this episode would be replete with flubs especially considering that most of the episode took place in 1976. However, from what I could tell everything seemed just as it should be.