Bates Motel season 4 is heading towards an interesting juncture. In episode 6 titled The Vault, Norman's psychological illness be an open secret, while a lot will be revealed about his mother Norma.

Click here to watch the episode live online on A&E's official website (only in the US).

While Norma and Romero are settling down in their "married life", Norman starts responding to Dr Gregg Edwards's therapy and decides to open up about his mental agonies because of his Mother.

A promo for the upcoming episode released by A&E shows Norman and Edwards having a quite therapy session that turns creepy once the Mother appears. Edwards tries to dig deep into Norman's past and asks him to talk more about his father.

In the next frame, fans see Norma sitting right next to her son, to which Norman reacts immediately by saying: "Why are you here?"

"She doesn't want me to talk to you," he tells the doctor. In the background, we can hear Edwards discussing a mental health condition called Dissociative identity disorder.

Norma, on the other hand, will try to conceal some of her secrets from Romero. "You are going to destroy my life. Go right the hell out of here," she yells at someone in the promo, hinting at some of her darkest secrets that might threaten her "happy" life.

The official synopsis of the episode reads:

Bates Motel season 4 episode 6 will air at 9pm EDT on 18 April on A&E network.