The plot was very interesting. Creating a gene as a drug to go undetected could be fascinating. Too bas these kids paid the price. A very high price.
I was very surprised to see Rachel attending Hood's nephew birthday party. Even Hood's sister had something to say about it and their obvious chemistry. It wasn't a bad thing, because this shows that they have a healthy relationship that is growing with time.
Rachel reveals us something. It gives me the impression that she's not sure that is her real place. Like she's doubting if she's doing the right thing or not. She has a nice conversation with the former FBI agent and she knows what she's giving up. As a sign of her fate, Hood calls her and she goes back to professional.
Great episode, nice interactions between the main characters. Couldn't ask for more.