Unlike most contributors, I found the overall programme to be somewhat disappointing. As at least two other contributors have mentioned, it seemed to be a publicity show for the McGregor brothers (and their mother [what the heck was she doing in it??]).
As has been pointed out, so much more was missing, than was included and why include a fatuous segment showing the brothers unloading 3 or 4 tons of potatoes from a DC3. Utterly unnecessary, since huge amounts of real footage is available.
As others have said, why was it not split into two or three episodes. Far more could have been included. I accept that there would still be omissions, but not as many as there were in this programme. And let me add, that the costs would not have been astronomical. How do I know, I’m a retired programme maker!!