Coal Hill School has been a feature of Doctor Who since the first episode, but now we get to see the day-to-day adventures of the students coping with intrusions from space and time.

When the news is announced that a comet is on an unavoidable collision course with Earth, the most hilarious and unexpected chain of events imaginable is set in motion.

An old Jewish baker struggles to keep his business afloat until his young Muslim apprentice accidentally drops cannabis in the dough and sends sales sky high.