Naomi appeared in Cas’ room. She had overheard Anna’s conversation with the Winchesters and now had to do something. If they would restore Meg’s memories she would remember Cas, including her feelings for him.
Then she’d go back to him and the world would be doomed.
Naomi had returned to Heaven to warn Raphael about Dean’s coming. He had assured Naomi that Dean wasn’t going to return home.
Naomi walked to the bed. Again she found Cas lying on the bed, staring at the ceiling. She walked behind the bed and placed her hands on his temples.
A white light radiated from her hands and black veins slithered from Cas’ temples to his head.
Cas lifted his arms and swung them at Naomi. He hit her in the face, but it didn’t stop her from completing her task.
After five painful minutes Cas stopped his attempts to fend Naomi off. His eyelids were shut and he lay still. Naomi let go of him and disappeared.

Evan entered the prison. Dean and Sam had explained everything. They had even managed to let him see Erin, so he had no other choice than to believe them.
He asked for Meg Masters.
Ten minutes later they were sitting opposite each other. Evan picked up the phone.
“I know everything” he started emotionless. “Why did you lie to me?”
“What do you mean?” Meg asked concerned.
“You pretended to be my fiancée Erin” Evan continued with a slightly shaking voice.
“I didn’t lie” Meg defended herself. “I don’t remember who I am. You told me my name was Erin and I believed you”
“You don’t remember who you are?” Evan snapped angry. “Well, I’ll tell you. You’re a murderer. You killed my Erin and I’ll make sure you’ll get what’s coming to you!”
He hung up and stood. Meg stood as well and started bashing the glass.
“No! Wait! Listen to me!” she yelled desperate.
Evan walked away while two guards dragged Meg back to her cell.