I am so disappointed in this episode, it doesn't follow at all the more mature, dark and grainy season premiere that had gotten my hopes up.
I found Mrs Tran ridiculously unbelievable and even downright goofy, the real-time plot doesn't progress a bit - some great episodes were out of the main storyline and still delivered, but this one is all in all quite phony. I loved the comedic episodes of the early seasons, but this doesn't compare at all : no surprising kick, no great line for the boys, they even seem kind of secondary characters in this episode, outrageous !
The major upside is how the purgatory plot thickens and leaves us on a great cliffhanger. But even that's kind of weak for a whole episode, I hope next one will be better !