Two Monsters Return
The BBC Have confirmed that the Cybermen and Silurians return in Episode 7 of Doctor Who Series 6 a week on Saturday. 

The mid-series final begins on Saturday at 6:45 in The Almost People. 

Air time and Details
The most recent issue of Radio Times has revealed that the episode will be aired from 6:40 until 7:30. 
Amy is kidnapped and in her cell in Stormcage, River Song reluctantly acknowledges the approach of the Battle of Demons Run, the conflict that will see the Doctor face his darkest hour. Meanwhile, the Time Lord races across galaxies to gather his allies for a rescue mission, unaware that he is straying into a carefully concealed trap.

Alex Kingston returns as River Song, Also reading Life The Universe And Combom, they have reported that Hugh Bonnerville and Oscar Lloyd are returning in the Episode as Captain Avery and Toby Avery. 

Also are the Sontarans making an apperance after filming reports saw a Sontaran with the TARDIS a few months ago! All will be Revealed