This has got to be one of my favourite Mentalist episodes. You get to see a different side to Lisbon (she seemed to be upset when she thought that Mashburn might be the killer).
It was obvious that Bejorin's wife was hiding something, but not so far that her husband was still alive.
Walter Mashburn is my favourite guest star so far. As much as I like the idea of a Mashburn/Lisbon union, I think the Jane/Mashburn relationship is much better and has much more potential.
Walter is filthy rich and is constantly looking for ways to get thrills (even the idea of being a murder suspect made him excited)and Jane's uncoventional detective work is just the ticket.
I, for one, hope that this is not the last we see of Mashburn.