My answer to the question of this thread would be name of the doctor.
It seems to be considered a good episode by many but I think it is dire.
The only interesting thing about Clara at all in series 7 was the mystery of the multiple Clara's, yet in name of the doctor we find out that the resolution to this previously intriguing mystery is actually one of the most irritating, nonsensical explanations that I've ever seen in the show, which not only falls apart if you think about it for a few seconds but also was the first, and probably worst time that Moffat tried to forcibly make consider Clara important (as opposed to the tradtional idea of actually making her likeable and letting us feel she is important naturally, by merit of personality), by actually showing a scenario in which, the doctor never actually did anything on his own from the time he left Gallifrey, right up until the end of series 7, but was somehow always helped by a Clara fragment who he never actually saw or interacted with (except for twice in his entire life).
Add to that, it being a tedious tease of an episode - e.g tease the doctors name, and even name the episode after that tease, when we know we'll never hear it, foreshadow the doctors death, by showing us a grave which had every indication that he died as 11, with the same console room and timestream that only went up to doctor 11 (which wasn't even a grave, because for the supposedly smart 'you didn't think there would be a body' line, we've seen the doctor/master die before(turn left, last of the time lords as some examples), and there is always a body and never a life force thing that name of the doctor showed) that again we knew wouldn't actually happen.
Plus things like how did Vastra still remember Strax when changes to the timeline meant he no longer remembered her?. How can a bit of data from a library computer (river data ghost) leave said computer to send itself across time and space at will?. How exactly can you 'die at every point in your timeline'? (you can only die once, and even if dying at every point in your timeline was possible, any smart villain would save the hassle and have just killed him once when he was the first doctor and automatically erase everything else that was to come after).
Also got to give a mention to how much it was completely and utterly stressed that on entering said timeline, it would be impossible to leave, and that as such doing so, was sacrificing your life, yet after both Clara and the doctor do so, the episode ends with them stuck in the timestream, with no way out (with Moffats writing seemingly hoping the appearance of John Hurt, and the words 'John hurt as the doctor' would make us forget all about their predicament, when actually it just seemed like he forgot about it), and we are never given an explanation in any episode, as to how they did what was said to be the impossible, and Yet in the real world, after stressing in the episode how impossible it was, Moffat and some Moffat fans believe the explanation 'they just walked out' is supposedly is some way sufficient' and that anyone who doesn't understand how an explanation that was completely contrary to everything said in the episode can be true must somehow be stupid.
As one small positive, I'll admit that like most others, I found the pre credits sequence fun, but after that the rest of the episode is an irritating mess that seems like it was written by some who has no concept of how time travel works (just based on the content of this particular episode), and who's only aim was some heavy handed attempt to try and force people into feeling something for Clara with plot rather than putting anything into her personality.
This one episode has has all of the things I dislike about Moffat's writing in one episode (when he does them, which is not all the time) - firstly the 'written for fans only' attitude to a story -e.g (the title sequence wouldn't be much of anything to non fans, nor would the first doctor/Clara scene, and the inclusion of 'the great intelligence' seemed to only be to thrill Classic who fans (I didn't find it particularly interesting). Then the weird and often nonsensical use of time travel he sometimes does, and mostly, not following through with a story because starting a new one is more interesting - e.g no resolution to the exiting of time stream because setting up teasing the next story having John Hurt as the doctor was suddenly more interesting.
The only saving grace is that, as far as i am concerned (and based on the evidence given this seems the most logical explanation), the events of time of the doctor completely wiped all the ridiculous events of Name of the doctor from the timeline and as such they never now happened, which pleases me, and also makes the episode 'name of the doctor' even more worthless in the grand scheme of the ongoing story.