Orbiting a quiet backwater planet, the massed forces of the universe's deadliest species gather, drawn to a mysterious message that echoes out to the stars. And amongst them, the Doctor. Rescuing Clara from a family Christmas dinner, the Time Lord and his best friend must learn what this enigmatic signal means for his own fate and that of the universe.
Two stories separated by 1400 years. After losing his mother in the midst of a war-torn country, an Iraqi child, learns the importance and power of patience by discovering the historical story of Lady Fatima and her suffering.