"Chitauri. Didn't you--oh. Nevermind. The Chitauri were an alien race that invaded New York in 2012. Back in 1941, the Doctor gave me a shot to help my immune system. We were going to the moon, don't ask. I didn't know what it was at the time, but there was some kind of Chitauri vaccination in the mix."
He saw the look on Jane's face, and shifted his hand until it could hold hers. "Hey. Stop that. You weren't yourself, and I surprised you in the middle of a fight. It's not your fault." He gave her a smile. "I'm just glad I found you."