The game Stone plays with Olafsson, where the players toss wooden cylinders attempting to knock down blocks, is a popular Swedish game called Kubb.
At one point at the lodge, Stone says to Cassandra "obviously you've never been in a bar when the Sooners were playing Oklahoma State." Christian Kane, who plays Stone, attended the University of Oklahoma (nicknamed the Sooners) who have a large rivalry with Oklahoma State.
Possible reference to Vikings (2013), season 4, when at the bar when the real Finklestein tells Olafsson that he was always jealous because the Vikings liked and made more sacrifices to him. They crossed seas for him (the raids which made Ragnar famous) and they all liked him better, even the Chinese girl (Yidu)