I thought this episode was much worse than a filler. The case was dull, some characters were unbelievable and I just think it was a waste of time.
I don't understand why Cal has changed so much. Good I have watched the season finale because he really improved and was again the character he was in the early days of the show. His silly attitude, combined with simple arrogance and a drunk look, makes me dislike him.
I love this show and I love Tim Roth, his chemistry with Kelli Williams and the great father-daughter relationship, so I hope it improves.