In the early sixties TV like this was uncommon in the Netherlands. Utterly absorbing stuff.
My father made me watch this series (black and white), when I was very young. I clearly remember the moment where, out in pouring rain, the lad shouts, "Rainbow, rainbow".
I was reminded of this episode when much later watching 'Teorama' (Fellini) with Terence Stamp, which was very similar.
I wish it were possible to get the series on DVD.