Dr. Ronald Yee: Well, the flies are not reacting. I can keep going, but I'll tell you now, it's very unlikely there are any traces of blood in here.
Rosa: Well, according to my timeline, this is the only place the murder could have happened.
Amy: Sorry, Rosa, looks like your timeline's wrong. Because the flies don't lie. You can use that if you want.
Captain Holt: He's not gonna use a cheeky slogan. He's a man of science.
Dr. Ronald Yee: I like it. The flies don't lie.