[Fan Submission] I think of all the companions that traveled with him, this might be the worst day of his lifespan. Not only did he lose a friend, he actually saw as it was happening and hearing her scream.
The screaming is going to be with him forever, and he was powerless to help her.
Sure, he's lost others (e.g., Amy/Rory) but none quite like this.
While her "selves" might be splintered throughout his timeline, this Clara was the original. No other Clara will be the same.














