I loved this episode as the storylines were really well written - specially the Frank heart attack one. He has always been there but never had we known much of him. I would say we did not know nothing about him until now and the way he opened him us, showed that even if he looks cranky fat man sitting on the desk and making cruel jokes, there are so much humane and so much care in him.. we have just not seen it. For that, this episode was super.
On the other hand - Sam and Luka. Please, I have enough of it, already. She cannot make up her mind, he cannot.. a pointless game..