Some new episode titles for the upcoming fifth Series have been revealed! Episode four is called 'The Time of Angels' and episode 5 is called 'Flesh and Stone.' These will be a two parter written by Steven Moffat, featuring the return of the Weeping Angels and River Song.
As reported sometime earlier, episode six is called 'Vampires in Venice' and is written by Toby Whithouse. So the list of confirmed titles so far are as follows:
5.1: The Eleventh Hour
5.2: The Beast Below
5.3: Victory of the Daleks
5.4: The Time of Angels
5.5: Flesh and Stone
5.6: Vampires In Venice (thanks Anonymous!)
It's sounding brilliant so far!