Everytime they "flash forward" to show you a section of someone's vision that you've already seen before, you take a drink.
If you make it through the episode without dying of alchohol poisoning, you get a point.
In all seriousness - this episode was much stronger than the previous two. It may actually be finding its rhythm - it moves much smoother when it focuses on the investigation than on his kid's background story, or his wife's possible affair.
Still waiting on Dominic Monaghan, though!