6. Shes River Song
Yeah, I said better fan theories. This one probably only would have been popular with Moffat himself, and when I first heard about this theory, my reaction was a 100 percent serious, No. If that happens, I am done with this show. But it made sense. A flirty, sassy woman who does impossible things and survives impossible odds on various occasions one who, unlike every main companion since Donna, does not meet River Song and is clearly shown in The Name of the Doctor to have little idea about who River is. It had a high degree of plausibility too stuff to do with River Song is Steven Moffats go-to plot. We were told that she was nothing more than human and after saving the Doctor in Lets Kill Hitler, River was nothing more than that, and she flirts with the Doctor like a champion. Though to be honest, thats what every female does with the Doctor these days. It was closely linked with the past episodes of the show and really tied in with Moffats usual oeuvre. Its pretty clear the fandom as a whole is glad that the show didnt take this road. Plausibility: 6/10 (Moffats tenure certainly hasclear characteristics) Popularity: 1/10 (Moffats go-to twist certainly hasclearly worn out its welcome)