As you may recall, when I last left you on the subject of The Diamond Brothers, I had finally managed to see their 1991 TV series for myself -- but that threw up a brand new mystery. I'd already known that episode 3 had been interrupted by a technical fault, but getting to see the show added something significant: the net effect of that fault, and the way ITV dealt with it, meant that any actor who was only in the affected episode was not credited onscreen at all. So I had seven characters in search of an actor.
I included screenshots of all seven in that post, and after spreading it far and wide, I'm happy to report that four have been identified. So where are we now?