Eleventh Doctor (The Curse of Fatal Death)

The Eleventh Doctor was a brief incarnation, that began when the Doctor's previous incarnation unwisely decided to tinker with some wiring. Because women terrified him, he found Emma very intimidating, even appearing shy when talking to the Master due to his "breasts", which were, really Dalek etheric beam locators. He regenerated into his his next form when he triggered an explosion after running into another room to avoid talking to Emma or the Master. (DW: The Curse of Fatal Death)