Joker's Favor - One of the best episodes of the series
From a comedy/irony standpoint, this is my favorite episode of the series.
Sure, it's not a deep, dark character development episode - rather a 'typical' Joker episode. But the writing is pure genius! What makes this special is that it's based on a scenario that most anyone could find themselves in.
If you haven't seen this episode (or don't remember it), do yourself a favor & give it a watch.