Let's talk about Ashildr.

[Thebestoftherest]

Since Chuck is doing the girl who died and the woman who lived soon. I personally don't like her, I feel like she would have made an excellent tragic villain, but her redemption felt undeserved and force. I mean she happily murder someone with a smile on her face and in a minute regret it, no I don't buy it. Personally I feel like she a good villain that was water down into a diet River Song.

[Artabax]

There were barrels of electric eels, so I expected Doctor would cure Ashildr with electric charge to the Heart.Clear!!! But no, TPTB pull an immortality pill out of their asses. Monsters are immortal and use holograms, why are monstres scared of holograms?

Let's kill Hitler River kills Doctor and resurrects him with Regeneration Energy like growing extra arms. So when Clara dies Doctor shoots General, I expected cure Clara with Regeneration Energy. OH no, that would be the C word. TPTB pull out of their asses yet another Multiverse destroying Paradox.

Prophecy the Half-blood will sit upon the ashes of Gallifrey that was nicely done. We expect Arya will assassinate Gallifrey like the Freys, but it's just her being there when Gallifrey dies of end of the Universe TM. BUT Random alien of the Week has bigger and better immortality magic than Time Lords???
Arya is awesome.

[clearspira]

Given how she ends in a Tardis and all, another great example of how you could have had a spin off with a female Doctor without actually changing his sex. Just saying.

[BlackoutCreature2]

I liked the character at first but she quickly wore out her welcome. She had the same problem that River Song had where every time she showed up she immediately became the focal point of the story and was always right about everything and the Doctor had to be the companion to her. Plus the fact that she was able to outlive the Heat Death of the Universe due to a malfunctioning piece of alien first aid always stretched suspension of disbelief just a little too far. Even Captain Jack's immortality conked out after a couple of billion years, and he got it from an omnipotent timestream Goddess.

[Sir Will]

River's great!

But yes, Hell Bent is horrible as is the fact that she survives til the end of the universe.

[Thebestoftherest]

I liked the character at first but she quickly wore out her welcome. She had the same problem that River Song had where every time she showed up she immediately became the focal point of the story and was always right about everything and the Doctor had to be the companion to her. Plus the fact that she was able to outlive the Heat Death of the Universe due to a malfunctioning piece of alien first aid always stretched suspension of disbelief just a little too far. Even Captain Jack's immortality conked out after a couple of billion years, and he got it from an omnipotent timestream Goddess.

I personally feel no one other than Steven Moffat cares enough about the two characters for anything to be done with them. Plus that show just doesn't sound interesting, Clara already over stay her welcome to Who fans and no one else would watch a show about them.