Later, after the CCPD had arrived and taken Brie Larvan into custody, Barry went to his lab to take care of any final paperwork relating to her case. He'd been working for a while when he heard a knock at the door.

"Doctor Mcgee," he said when he turned and saw her standing in the doorway, surprise creeping into his voice.

"May I come in?" she asked, which seemed a bit odd since the door was open, but Barry decided not to question it.

"Yeah, of course," he replied, shifting in his chair. "What can I do for you?"

"I wanted to apologize," Doctor Mcgee said. "I should have listened to you when you warned me about Brie. Perhaps next time I will take the CCPD's offer of protection.

"After we lost your tachyon prototype, I can understand why you were hesitant to trust us," Barry admitted.

"Thank you," Doctor Mcgee replied with a small smile and a slight nod, and turned to leave.

"Can I ask you something?" Barry asked before she could, getting up from his chair. She stopped and turned to look at him questioningly.

"I couldn't help but notice some tension between you and Doctor Wells," he went on.

"That's all in the past," Doctor Mcgee assured him.

"Do you mind if I ask what happened between you two?"

"I ask myself that question all the time. Fifteen years ago, Harrison Wells and I were thick as thieves. We were promising young scientists in Starling City. He was such a kind man. Then everything changed after Tess died."

"They were gonna get married," Barry remembered. Doctor Mcgee nodded.

"I understand how grief can change a person, but this was more than that," she said. "It was like, after that day, Harrison Wells became a completely different person." There was a long pause, then she said, "Good day" and turned to leave once more.

"Bye," Barry replied, and then she was gone, leaving him alone to mull over what she had told him. It seemed that now he could pinpoint the exact moment at which Harrison Wells had become the Reverse Flash. The only question that remained was how exactly that had happened.

He was still pondering that when he went to Jitters to say goodbye to Felicity and Ray before they went home to Starling City, and he was pondering it when he returned to his lab afterwards. It was still on his mind when he talked to Joe and Kara about revealing the truth to Cisco and Caitlin- as per Felicity's advice- and it remained in his thoughts as they came up with a plan for how best to do that. It was even still at the forefront of his mind when the time came to set that plan in motion, though he knew it would soon be overshadowed by everything else they would have to deal with.

"All right, all right, who's ready for some karaoke?" Cisco asked, walking into the lab with Caitlin in tow. He sang the last word of his sentence, and Barry winced, suddenly regretting using that as the pretense to get them to meet him here, because they seemed genuinely excited about it, and now here he was, about to ruin not only their night but possibly their lives as well. At the very least, their view of Wells as a good man and a hero would be forever shattered.

"We're not going to karaoke, are we?" Caitlin asked when Joe and Kara stepped into view, both of them grim faced.

"No," Barry replied, and he could hear that his tone of voice was just as grim as the expressions on Kara and Joe's faces. Gesturing toward his investigation board, he added, "This is everything we know about the Reverse Flash. I've been collecting information on him for a long time." Walking toward it, he went on, "And this is everything we know about Doctor Wells" and pulled down the sheet in question, the very same one that he and Joe had been studying before the Trickster's attack the week before.

"I don't understand," Caitlin said. "What do Doctor Wells and the Reverse Flash have to do with each other?"

"They're the same person," Barry replied.

"That's impossible," Caitlin protested, shaking her head.

"Look, Caitlin," Barry said. "It took me a long time to believe it too, but it's him."

"He's right," Kara put in. "Listen to him."

"Doctor Wells is a speedster?" Caitlin asked skeptically. "He's paralyzed."

"Is he though?" Joe spoke up.

"And why would he have tried to kill Barry when he was a kid?" Caitlin went on. "It doesn't make any sense." Apparently noticing that Cisco had been silent this entire time, she rounded on him and demanded, "Cisco. Say something."

"I've been having dreams," Cisco mumbled in reply. "Mostly at night, but sometimes during the day." There was a far off look in his eyes, like he was reliving some kind of trauma. Barry found himself glancing over at Joe and Kara, trying to gauge their reactions, wondering if they were as troubled by the direction this seemed to be going as he was.

"But they don't really feel like dreams," Cisco went on. "They… they feel real."

"What happens in these dreams?" Barry dared ask, though he couldn't escape the feeling that he knew what the answer would be.

"Doctor Wells is the Reverse Flash," Cisco replied. "And… he kills me."