Clara/Jenna was good in this two-parter, they wasted the character for most of the series but this one gave Jenna something to do and stick her teeth into.
As for the episodes over-all, from what I remember, as I haven't re-watched the series like I normally would as it fell flat for me, they were the better ones only beaten by Heaven Sent..... but I can't say I remember much about the episodes other than Jenna being good in them and the Doctors speech at the end, series 9 was quite forgettable IMO and the only things that do stay in mind are for bad reasons like eye dust monsters...
I think series 9 will be one of those seasons that not many people will go back and re-watch and because it was unmemorable each episode will remembered by a summary line... so with that in mind lets play -
How Series 9 Will Be Remembered
1. The Magicians Apprentice - Pointless plane plot, Tank and wondering around the universe.
2. The Witch's Familiar - The 3 Big villains, the Master Davros and the Daleks, all together in one episode, and they do nothing scary dangerous destructive or evil, but the doc does have a good chat with them all.
3. Under the Lake - some ghosts under water appear.
4. Before the Flood - the ghosts the plot and the environment/setting make no sense, big alien dude does nothing.
5. The Girl Who Died - umm... is this that Viking episode?.. the tellytubbies baby is all grown up and now has a beard but still appears in the sky for us... Doc makes a girl immortal as easily as it takes to make a cup of tea.
6. The Women Who lived - ... I think there was a lion man, I'm pretty sure there was, I remember waking up after the endless immortal talks and there was a lion man.
7. The Zygon Invasion - Oh that's the one that picks up the Zygon story from the 50th
8. The Zygon Inversion - Jenna is pretty.... and plays a cool evil twin... Doc makes a speech
9. Sleep No More - WTF, sleep dust monsters... were they serious? or was this some social test to see how far they can go with any old cobblers and still get people to buy into it..
10. Face the Raven - That's the one Clara kind of dies in right?.... yeah and the one where a magic bird renders all the Who villains pointless, why have armies and evil schemes to kill the Doc, just send a raven after him apparently there's no escaping it in the ENTIRE MASSIVE EVER EXPANDING UNIVERSE, if things like the raven exist and in 21st century Earth times to boot, the doc should of been dead as a dodo long ago.
11. Heaven Sent - the one where the Doctor is on his own in a loop smashing his way through a wall.. and some confusing thing about a confession dial that makes no sense...
12. Hell Bent - Galifrey is back, its boring... Clara is going to live for as long as she wants and has her own Tardis, I think there was something about a immortal girl or something I don't know...