In this Doctor Who spin-off, students from Coal Hill Academy repel an invasion of shadow aliens.
The Doctor and Clara find a community of aliens secretly living in London, and try to save their friend Rigsy from getting killed by a raven.
While dealing with a TARDIS-related mystery, the Doctor encounters a masked pyromaniac. Also includes two back up stories featuring Sontarans and the Celestial Toymaker.
In this found footage-style episode, the Doctor and Clara arrive on a space station overrun by sand monsters.