A scientist, tired of being laughed at by his peers, creates a time machine and travels back to medieval times. He tries to impress the king and queen with modern inventions, but only ends up being laughed at again, eventually ending his days as the queen's court jester.; The Dalek Emperor is victorious in his duel with Zeg. The Daleks begin experimenting with space travel, and arrive on a planet of sentient plants.; The Doctor and Sharon fall through a hole in dimensions and are offered tea by Meltron, the Guardian of the Gate. Brimo notices her power draining, and discovers the Doctor.; The Cybermen return from looting the weapons vaults of the Deathsmiths of Goth, only to find Junior Cyberleader Loktar suffering from a strange disease.