Chaotic neutral meets chaotic good. Their romance was built on a lie, a mission, and a time-travel psychosis, yet it became the most real thing in the series. They are both damaged, sharp-edged people who found a weird, comfortable home in each other.

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"Big ass" doesn't get bigger than a Time Lord falling for a shop girl from London. This storyline broke the rules of time and space. "I burned up a sun to say goodbye."