When scientists in the Antarctic uncover a mysterious seed pod, the Doctor is called in to investigate. He soon realises it is extraterrestrial and extremely dangerous. At the same time, however, ruthless millionaire plant-lover Harrison Chase has learned of the find and decides he must have the...
The Reverend Justin Somerton, a scholar of medieval history, and his protégé Lord Peter Dattering are visiting an abbey library. While studying a stained glass window, they uncover clues leading to a treasure hidden by a disgraced abbot.
