This is a spoiler-free review of Knightfall: “You’d Know What To Do.” History’s Knightfall delivers a fascinating story centered around the Knights Templar and their quest to find the Holy Grail in the early 14th century. Like the network’s flagship series Vikings, Knightfall proves why History needs to develop more original dramas. Knightfall goes big and bold right from the beginning with a large-scale battle set in the city of Acre.