Having watched the second programme, I find myself agreeing with the comments above. However, at least it showed lots of mistakes, and even pointed out some of them as such - growing under a tree, for example. The BBC Gardening website
http://www.bbc.co.uk/gardening/grow_your_own/ contains links to the technical backup which had to be lacking in 30 minute episodes.
But, as I have said earlier, it is a colourful programme attempting to enthuse people who do not grow.
The unfavourable comments on this thread are, of course, from experienced gardeners - OK we do not need this kind of approach. Bring back Percy and Arthur

I don't think they were addressing the non-gardener. I learned vegetable gardening many years ago - enthusiasm and practice - from an inherited copy of
Practical Gardening and Food Production in Pictures by Richard Sudell, F.I.L.A. published by Odhams Press during World War 2. I still treasure it, but no way would I recommend it to aspiring growers nowadays.
Just one other point, which I do not intend should offend anyone. The programmes seem to give the impression that "growing your own" is only for women. Or is it that scantily clad younger women are easier on the eye that horny-handed males?
Cred air o bob deg a glywi, a thi a gei rywfaint bach o wir (hen ddihareb Gymraeg)
Believe one tenth of what you hear, and you will get some little truth (old Welsh proverb)