Betrayal of William Wallace; Casanova's Greatest Love; Astronomical Whodunnit

The legend of Scottish rebel William Wallace comes to an end when he is captured by English King Edward I at Chillingham Castle in Northumberland, England. Duchcov Chateau in Duchcov, Czech Republic is where the great seducer Giacomo Casanova spent his last days after losing his love for a married Frenchwoman. Kronborg Castle in Helsingør, Denmark once served as an observatory to astronomer Tycho Brahe who's sudden illness leading to his death was solved over 400 years later.