Hill's Escape
There's an episode where Augustus talks about escaping in a coffin and then having a friend in place at the funeral parlour to open it up and free him. At the end of series 2 (I think it's series 2 but it's definitely a final episode) he closes himself up in a coffin, but in the next episode of the next series there is no mention of it at all, not even a mention of him backing out of it. I always wondered what happened with regards to his escape?
Of all the prisoners in Oz he's the only one I would have liked to see get away. He always seemed like a decent guy who just got a bit unlucky.