'A Sharp Injector' (anagram of 'Patriarch Jones'), Dawn and Ian's father (Jack Jones?) makes an undercover appearance in an episode. Their father is surreptitiously checking up on Dawn's progress by posing as a crack addict on the street.
Ian and Dawn are in the car, they see a man waving at them in the street so pull over.
Man in street (taking ages to stumble desperately over to the car - reminiscent of Ian in the second episode): "Has anybody got any crack?"
Dawn Jones (wanting to help, rummaging around in her bag): "No, but I've got some gum?"