The Sonomancer

On the other side of the galaxy a mining company is exploiting the already unstable planet of Syra for every precious mineral it contains. River Song is attempting to save the native people. She needs the Doctor's help, but she also knows he mustn't yet discover her true identity. The final confrontation sees the Doctor once again face his enemy the Eleven in an attempt to prevent the destruction of Syra and the genocide of its inhabitants.