milko

The episode of D4 called 'Approach with Caution' screened 30 January 1974 features, very momentarily, a milkman's horse (and the 'milko'). Surely this was the very end - less than 12 months - before milk deliveries by horse in Melbourne stopped. It's odd they feature so much in D4 and there's obviously a real nostalgia for them. 

Gus Mercurio plays a tremendous villain in this one, too, by the way. 

d4 young hennessy

26 September 1973's episode of D4 was called 'Young Hennessy'. It was less worse than it might have been considering the somewhat unpromising storyline and other components (basically, Young Hennessy is an o-o-o-ld boxer who everyone thinks has a lot of money hidden somewhere in his house). The acting is stellar. There's Gus Mercurio actually playing a good guy, and get this, you really don't know if he is good, up till the end. There's Hilda Scurr, playing Mrs Hennessy and really making a meal of a role which is really not much more than a pissed-off old wife. Jeepers, even Simon Drake as a young boy called Luke isn't the terrible kind of child actor that most child actors are. Perhaps best of all - this is like a Logie contender performance, though I don't think it was one - is John Fegan as Young Hennessy. Fegan was four years out of Homicide by this stage, and while he was a compelling presence as Connolly in Homicide he wasn't exactly required to do anything more immense than deliver lines in a fairly pissed off and stern tone, a lot. Here he really puts in the time and gives such a committed performance well, I'm not sure if this is an example of good acting exactly, but... often you can't tell what he's saying. But you feel like you can. 

By the way they go to Puffing Billy including getting off at Clematis.