Doctor Who Series 9 What we know so far: August 2015

Anything in italics is speculation only. Some have good evidence to be true but have not been confirmed by the BBC.

Main Cast 

The Doctor - Peter Capaldi (full series)
Clara Osworld - Jenna Coleman (full series excluding episode 11)
Missy - Michelle Gomez (Episode 1-2, 11-12
Kate Stewart - Jenna Redgreave (Episode 1-2, 7-8)
Osgood - Ingrid Oliver (Episode 1-2, 7-8), still dead but this story will be                  seen before the event of Dark Water and Death in Heaven
Rigsy - Jovian Wade (Episode 10)
Orson Pink - Samuel Anderson
Ohila - Clare Higgins (Episode 1-2)
Shadow Architect - Kelly Hunter (Episode 1-2)
Susan Foreman - Caroline Anne Ford

Lobus Caecilius - Peter Capaldi (Episode 11)

John Frobisher - Peter Capaldi (Episode 11)

Enemies

Missy - Michelle Gomez (Episode 1-2)
Zygons (Episode 7 and 8)
Ghosts (Episode 3 and 4)
New Monster (Episode 5 and 6)
Daleks (classic and new) (Episode 1 and 2)
Sisterhood of Kahn (TBD)

Judoon (TBD Episode 1 and 2)

Hath (TBD)

Snake Creature (Episode 1 and 2)Davros (Episode 1 and 2)
Thals (Episode 1 and 2)
The Weeping Angles (Episode 1 and 2)
The Silence (Episode 11-12)
The Sea Devils (TBD)

Episodes 

Episode 1/2: The Magician's apprentice/Witch's Familiar - Steven Moaffat
Episode 3/4: Written in the Stars/ TBD - Toby Whitehouse
Episode 5/6: The Girl who Died/The Woman who Lived - Jamie Mathieson                     and Steven Moaffat/Catherine Teganna 
Episode 7/8: Invasion of the Zygons/Inversion of the Zygons - Peter                                 Harness/Peter Harness and Steven Moaffat                       
Episode 9: TBD - Mark Gattis

Episode 10: Invasion of the Invisible Streets - Sarah Dollard
Episode 11/12: TBD - Steven Moaffat

Changes since last time

New Rumour of Peter Capaldi's faces being explored in Episode 11

Clara will not be in Episode 11

Rigsy is only for Episode 10 not 9

Daleks have been confirmed for Episode 1 and 2

The Judoon and Hath have been confirmed, the Judoon rumoured for the Episode 1 and 2.

Episode 9 and 10 will be single parts, however Episode 10 is rumoured to lead into the final.

The titles of Epsode 7 and 8 have been confirmed.

Episode 8 is co written by Peter Harness and Steven Moaffat 

Episode 10 has a rumoured title.