That's a tricky one - I know there's a lot of effort goes into being able to do work in parallel. It's possible that a smaller pool of actors and locations might work against that, as the same people are required more often.

Best
1. Listen
2. Mummy on the Orient Express
3. Into the Dalek
4. Flatline
5. Deep Breath
6. Kill the Moon
7. The Caretaker
8. Time Heist
9. Robots of Sherwood
Worst

Genuinely hard to rank. So many episodes hovering around the 8 mark.
I'd go with:

1. Listen
2. Flatline
3. Robot of Sherwood
4. Mummy on the Orient Express
5. Deep Breath
6. Into the Dalek
7. Time Heist
8. The Caretaker
9. Kill the Moon

Did some small revising of my scorecard.

1. Listen
2. Mummy on the Orient Express
3. Flatline
4. Deep Breath
5. Into The Dalek
6. The Caretaker
7. Time Heist
8. Kill the Moon
9. Robot of Sherwood

But for context, I have rated all of Series 8 Good or Excellent as I have found it a very enjoyable and varied series. With a shining lead.

EXCELLENT (5/5)
1. Mummy on the Orient Express
2. Flatline
3. Listen
4. Into the Dalek
5. The Caretaker

GREAT (4/5)
6. Kill the Moon
7. Deep Breath

GOOD (3/5)
8. Time-Heist
9. Robot of Sherwood

To put that in context, I have no major criticisms of Deep Breath, and very few of Time-Heist for that matter, so this really is a very high-scoring series. Equally, though, I don't think Mummy is on the level of The Impossible Planet, Human Nature, Blink, Silence in the Library, The Waters of Mars, Vincent and the Doctor, The Girl Who Waited, etc. etc., so unless one of the last two stories pulls some serious witchcraft out of the bag I can't see anything breaching my top ten. Really superb, though, some fantastic television. With it all laid out like that, I'm genuinely surprised by how low Kill the Moon and Deep Breath are.

Best at the top:

1. Deep Breath
2. Listen
3. Mummy on the Orient Express
4. The Caretaker
5. Time Heist
6. Into The Dalek
7. Kill the Moon
8. Robot of Sherwood
9. Flatline

Best to Worst:

1) Flatline
2) Mummy on the Orient Express
3) Kill the Moon
4) Listen
5) Deep Breath
6) Into the Dalek
7) Time Heist
8) Robot of Sherwood
9) The Caretaker

Best to not so great but still pretty smashing

1.Mummy on the Orient Express
2.Listen
3,Flatline
4 Kill the Moon
5.Into the Dalek
6.Deep Breath
7.The Caretaker
8.Time Heist
9.Robot of Sherwood

1. Mummy on the Orient Express - Sublime. Only Frank Skinner let it down, but that's more than ignore-able.
2. Listen - Brilliant.
3. Flatline - Clara gets better every episode
4. Kill the Moon - I'm not a science type person, so I can ignore all that because the drama was incredible.
5. Time Heist - Really quite original
6. Deep Breath - Good, but much too long and too Matt Smith-y. Tired of the Paternoster Gang and the dialogue with them was particularly unnatural and jarring
7. Into the Dalek - Interesting concept but slightly disappointing
8. The Caretaker - Good in parts but more SJA than Doctor Who (not that I didn't love SJA of course)
9. Robot of Sherwood - Not bad by any means, just not up to the standard of the others. That said,
"Soiled myself?"
"Did you? Well that's getting into character"
is one of my favourite lines of the series so far.

Still the best series we've had for a long time, Capaldi is fast becoming my favourite Doctor and him and Coleman have amazing chemistry.

I'd give them 3/5 because it's been an average series. The show has become a mosnter of the week series where random gadgets and the sonic screwdriver are used as plot band aids.

Capaldi it good enough but just appears to play himself, Jenna is getting better as each episode goes and makes the show bearable even in the more boring episodes.

(Best)

1. Listen
2. Mummy on the Orient Express
3. Flatline
4. Into the Dalek
5. Kill the Moon
6. The Caretaker
7. Deep Breath
8. Robot of Sherwood
9. Time Heist

(Worst)

Enjoyed Time Heist quite a lot, so Worst really means, Quite Good.

It's nice. I think those that are enjoying this series are really enjoying it. Makes me sad for those that aren't!

I'm struggling to remember a time that Doctor Who wasn't a monster-of-the-week series?

If you're such a fan of lists, perhaps you could start a list of the best and worst lists on this forum

Rated from 1. Brilliant to 9. Very good -

1. Listen
2. Deep Breath
3. Into the Dalek
4. Flatline
5. Mummy on the Orient Express
6. Robot of Sherwood
7. Kill the Moon
8. The Caretaker
9. Time Heist

I like you

I can't really rank them in this way but this is very similar to how I have seen them, certainly the top 4, though Time Heist was boring, which is a worse 'crime' for me than script problems, so although it was sound as a script I'd put it lower.

The start of series 1 (Hartnell)

1. Listen
2. Mummy on the Orient Express
3. Into the Dalek
4. Time Heist
5. Flatline
6. Deep Breath
7. Kill The Moon
8. Robot of Sherwood
9. The Caretaker

Listen being 10/10 and The Caretaker being 4/10

Robot of Sherwood was by the far the worst. It genuinely shocked me that that stale script was thought interesting enough or original enough to make it into the new series. It makes me wonder how truly appalling the rejects must be, unless Moffat just included it as a favour for his mate Gatiss.

Great to get so many varied opinions.; I don't think any two lists are exactly the same!
Overall, 'Mummy on the Orient Express' seems to be the most consistently rated near the top. 'Listen' seems to be 2nd favorite.

I'm VERY surprised that 'Caretaker' isn't rated lower. I struggle to see what ppl like about that episode.
I'm also surprised how popular 'Flatline' is. After last week's lavish sets and imaginative environment, this week felt visually 'flat'
For me, 'Flatline' is just an improved version of 'Fear Her'.

First time I've voted 'Poor' for as long as I can remember. I thought it was dreck.
(No, I don't want to start a flame war!)

Best
1. Flatline
2. Mummy on the Orient Express
3. Deep breath
4. Time heist
5. Into the Dalek
6. The Caretaker
7. Robot of Sherwood
8. Listen
9. Kill the Moon
Worst

Maybe I'm odd but "Listen" left me completely cold (maybe I should re-watch it) and the less said about the moon-egg the better...

1. Listen
2. Kill the Moon (Yes, Kill the Moon, couldn't give a monkeys about space egg science)
3. Deep Breath
4. Into the Dalek
5. Mummy on the Orient Express
6. The Caretaker
7. Flatline
8. Robot of Sherwood
9. Time Heist

1. Listen
2. Mummy On The Orient Express
3. Deep Breath
4. The Caretaker
5. Flatline
6. Into The Dalek
7. Kill The Moon
8. Robot Of Sherwood
9. Time Heist

^I might be alone in this, but one of the reasons I didn't like 'Flatline' was the look of the episode.
I like aesthetically pleasing DW - whether the action takes place on an alien world or in a 'period' setting.
Following in the heels of Mummy - with it's sumptuous sets and sophisticated society - the ASBO teens and graffiti-spattered walls of backstreet Bristol was quite a come down!