It is revealed that Rev Bem's native name means "Red Plague".
All of the magog horde have ragged gym-sock looking wraps at ankle and wrist. This covers where the seams in the costumes would be, making the furry suits cheaper and quicker to produce.
The closing words of Yeat's poem "Second Coming" gives us this episode's title. "And what rough beast, its hour come round at last, slouches toward Bethlehem to be born". The short poem gives a taste of the chaos of The End Times of the Apocalypse.