Vikings: Valhalla is a sequel to Vikings. Though it's on Netflix instead of History, it nevertheless details the continuing exploits of the Northmen as they expand their reach across Europe and beyond. This being a follow-up, it makes sense to have some callbacks.

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Indeed, Valhalla has plenty of references to the original Vikings. These are often direct references to past characters, but some are more obscure, having to do with familiar ideas or locales. As such, they may fly right over most viewers' heads. Only eagle-eyed fans can find all of these Easter Eggs.

7 Uppsala

Uppsala in Vikings

To find her purpose, Freydis travels to Uppsala on the advice of Jarl Haakon. This is the spiritual center for the Northmen, a place where they can celebrate and be closer to the gods. It's not the first time viewers have visited here, though.

Ragnar Lothbrok and his family journey to Uppsala in the first season of the previous series. The goal is to make a sacrifice. In this case, said sacrifice is a Christian priest named Athelstan. The characters explain that it's a semiregular ritual for them, but audiences never see Uppsala again.

True, Kattegat is also in both series, but it's the main hub of the franchise. Therefore, it would obviously be a recurring presence. On the other hand, Uppsala hasn't shown up in years, so bringing it back for Valhalla is a deep cut.

6 The Seer

The Seer in Vikings Valhalla

This is easily the most blatant callback to the original Vikings. The deformed fortuneteller makes a cameo from beyond the grave when Freydis comes to Uppsala. She enters a vision, but he's oddly dismissive. His only advice is to press on despite her fear. To be fair, he wasn't much help in the preceding series, either.

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Numerous characters in Vikings come to him in search of answers. In every case, he responds with vague riddles and prophecies, many of which are self-fulfilling. Moreover, they rarely leave the characters satisfied. In that context, the Seer's attitude in Valhalla is just par for the course.

5 Harald Finehair

Harald in Vikings and Vikings Valhalla

Early on, Leif and Freydis meet Harald Sigurdsson. Pursuing a romance with the latter, he brags that he's descended from King Harald Finehair. Freydis smirks and says that she doesn't know who that is. While this line is obviously here to explain Sigurdsson's ancestry, it may also be an intentional dig.

Finehair is a prominent character in the first Vikings. He switches sides constantly in his quest to become the king of Norway. He eventually succeeds, but it brings him little happiness. By his own admission, he has "no luck with women." Those he loves are either interested in someone else or killed prematurely. Having Freydis laugh off his name shows that his rotten luck sticks to him well after his death.

4 Emma Of Normandy

Rollo in Vikings and Emma in Vikings Valhalla

Here's another Northman descendant, but not a Viking. Emma is a figurehead of Wessex, but she actually hails from Normandy. Specifically, she is part of Rollo's family line. He was a Viking warrior who participated in a siege of Paris. Afterward, the emperor granted him land and title if he defended France from future incursions. The Scandinavian settlers who prospered here formed the region of Normandy.

Viewers see much of this in the original show. Rollo's conflict with his native people is a big part of the drama. Considering Emma acknowledges her kinship with the Northmen (and even marries one), fans will be curious to see if she'll go through the same identity crisis.

3 Name-Drops

Ragnar, Ivar, and Bjorn in Vikings and Canute in Valhalla

King Canute certainly makes a powerful first impression. Following the massacre of Danish settlers in England, he delivers a rousing speech to his Viking army, encouraging retribution for this affront. He stresses that the great Viking heroes wouldn't have let it go unpunished, and nor should they.

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This is where he references several figures in the sagas. Ragnar Lothbrok, Bjorn Ironside, and Ivar the Boneless all get a mention here. These guys are major protagonists of the previous show. Their ambition and exploits drive the narrative at different points, transforming the Viking world in the process. Because of that, their names obviously carry weight. It's no small wonder why Canute harkens back to them before embarking on his own grand destiny.

2 The Gold Standard For Shield-Maidens

Freydis in Vikings Valhalla and Lagertha in Vikings

Part of Freydis's journey involves her training to become a shield-maiden: the elite warrior women serving under Jarl Haakon. While not as plentiful as male Vikings, they did exist in certain capacities. In fact, they're some of the most famous figures in the Viking sagas.

Chief among these in the first show is Lagertha. Starting as Ragnar's first wife, she soon branches out as her own ruler and commands vast armies as the queen of Kattegat. As strong as she is, though, she only ever wants peace for her family and her people. That's largely the reason that she's so beloved and respected. It's also why she comes up in conversation with Valhalla's shield-maidens. Lagertha's legacy gives them something to aspire to.

1 A Miracle

Harald and Leif in Vikings: Valhalla

When Leif lives through numerous battles and defies impossible odds, he starts to marvel at his fortune. Harald, a converted Christian, tells the hero that God is watching over him. He chalks it up to a miracle: an unexplainable occurrence brought about by divine intervention. That word choice should strike a chord with fans.

Miracles are a recurring topic in Vikings when discussing differences between Norse beliefs and Christianity. Athelstan explains the phenomenon to Ragnar. The Viking king later jokes that his supposedly conceiving a son with Mercia's Queen Kwenthrith was one such occurrence, as they never slept together. Ivar later questions the concept while conversing with Bishop Heahmund as he relates the story of Jesus's birth by the Virgin Mary. The Northman asks how that's possible, and the bishop states that it was a miracle. Ivar scoffs in agreement.

Suffice it to say, Leif is a bit more receptive to the idea. Audiences have to wait to see how that changes him going forward. Whatever the case, it's likely not the last they'll hear of miracles in this series.

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