If ever there was a title that represented truth in advertising, this is that title. All the characters in this limited series have their secrets, and in some cases, their their own hearts and minds keep secrets from themselves. The series features very good writing and excellent acting, especially from the principals: Lily Rabe, Amy Brenneman, and Hamish Linklater. Plenty of twists and turns for fans of murder mystery thrillers. So why did I rate this only 7 out of 10? Because the last couple of episodes start to spiral down a bizarre rabbit hole of secrets and conspiracies that are not plausible. "Heroes" become "villains" and vice versa. Certain secrets that we finally thought that we had learned and understood, turn out to not be true. That's all well and good if my disbelief and trust in "Occam's Razor" can be suspended, but everybody has their own limits in that regard, and mine were exceeded. Plus, I have a pet peeve about the last scene/shot of a drama being used to set up a "sequel" (or a second season, in this case), and not to provide any closure to the original story/season. Hence, a potential 9/10 shrinks by two.