Amy Pond has been kidnapped and the Doctor is raising an army to rescue her as the drama continues. But as he and Rory race across galaxies, calling in long-held debts and solemnly given promises, his enemies are laying a carefully concealed trap.
In her cell in Stormcage, River Song sadly acknowledges that the time has come at last â€“ today will mark the Battle of Demons Run and the Doctorâ€™s darkest hour. Both sides will make their sacrifices and River Song must finally reveal her most closely guarded secret to the Doctor.
Aired: 4 Jun 2011