Blood and Quiescence/Crau a Chwsg - S1-E10
Factual error: Annora is seen playing a piano. This is set during the reign of Edward II of England (1284-1327) and the earliest known reference of the harpsichord (the forerunner of the piano) was in Padua, Italy in 1397.
Revealing mistake: Just before he sees his wife in the crowd, he lifts the sword up, revealing a blade with very dull edges (unsharpened replica sword), which magically becomes super sharp 1 minute later when he slices the guy's head off without any problems. (01:27:20)
