Martha Jones: she saved the world. Not with the Tardis, or a metacrisis, or the universe running through her head at night, or by jumping into the Doctor's time stream. She saved the world by telling a story.
Martha Jones - people give her a hard time because they were getting over rose, but this woman spent the whole series saving the doctor's life. Which other companion was a bodyguard? All there for him to save.
The most under-appreciated companion. Her confidence and ability were amazing. I found her a refreshing change :-) << I HAVE NO IDEA WHO WROTE THIS, BUT I LOVE YOU! Martha is epic and amazing and seriously underrated.