Ianto was surprised by just how much time there was between them.
"Over a year," he said, "for me. Longer for you...but I'll get to that. First...there was an incursion at the hub a few weeks after Gwen was hired. A partially converted cyberman." He looked down slightly, choosing his words carefully. "It was my fault. It was Lisa. I was trying to cure her. We both know I was hardly stable after Canary Wharf. I realised after that I had foolishly endangered the team...all of Cardiff. The threat...was neutralised. I honestly can't say why you didn't follow protocol and kill me or retcon me. I'm glad you didn't though."
He sighed. "Maybe I'm being stupid, telling you this," he said, "but I don't want to lie about anything. You deserve the truth, sir."