In Which Dame Leslie and Sir Blackwood after much effort and over coming adversity finally complete 2004 King Arthur.
The Great Conspiracy: https://en.wikipedia.org/wiki/Great_Conspiracy
Pictish Crossbow: https://canmore.org.uk/site/35560/st-vigeans-drosten-stone
Sarmatian religion: http://www.encyclopedia.com/environment/encyclopedias-almanacs-transcripts-and-maps/sarmatian-religion
Behind the Scenes Stuff:
Notes: The woman in Monty Python and the Meaning of Life who chase a man off the cliff to his death while topless are dressed like Roller Derby performers but don't appear to be wearing any actual rollerskates, I am going to assume they were meant to since you never see their feet they just didn't want any of the women to injure themselves.
Mabel making Farting Noises - Gravity Falls
Music and man going off a cliff -Monty Python and the Meaning of Life
Rebel Blockade Runner - Star Wars Sound Track