The Doctor is working undercover in 1890s Galway whilst investigating the mysterious sinking of the RMS Majestic. Witnesses recall something huge crashing into the sea, causing a massive wave which overturned the ship. Could it have been the mythical sea creature known as the Dobhar-chu?

Also on the scene is James MacFarlane, intrepid journalist and friend of the Doctor. Reunited, the pair discover death stalking the area in the form of animated corpses. The Doctor soon realises that aliens are present, and unless stopped their plans could kill everyone in County Connemara!

Dan Starkey, who played Strax and other characters in the BBC TV series, reads this zombie chiller from Andrew Lane.