I think Law and Order is a little more realistic than Boston Legal.
L&O actually has some really interesting episodes that are based on actual law. There's a cool one where a guy and his pregnant girlfriend decide they don't want the kid, but can't get an aborition, so he whacks her around in the stomach, and the fetus dies (consitutes GBH to the mother) and then the mother dies because of some bizzare unforseen complication and he gets charged under constructive murder because her death was immediately after a serious offence (GBH) and he only needed the intent for that initial act. Which would work in the AU law system too. So yeah, clever scenarios.