Continuity mistake: When King Ecbert's Soldiers are coming out of the gate for the hostage exchange, the 2 soldiers on the right do not have shields. When the camera cuts and comes back to them, all of a sudden the shields appear. (00:09:43)
Continuity mistake: Rollo and Bjorn are seen practicing with one another. Rollo slashes Bjorn across the left side of his stomach first and then slashes his right arm. After Rollo forces Bjorn into submission on his back he then extends his hand and helps Bjorn to his feet. When Bjorn stands up the slash mark across his stomach has completely vanished. (00:07:25 - 00:08:20)
Continuity mistake: Ragnar is using a shield for target practice, throwing three knives. The positions of the knives as they are thrown into the shield changes between shots.
Continuity mistake: After spotting Lagertha's boats, Torvi points at the boats and lowers her pointing arm. Another shot later and she is still pointing and lowers her arm again.
The Profit and the Loss - S4-E7
Continuity mistake: While speaking with Wigstan, King Ecbert's left hand is open and slightly pointing at Wigstan. The next shot his hands are clasped in front of his chest.
Continuity mistake: In the shot where Ragnar asks Floki if he can build something to lift the boats over the mountain after Floki says "Everything I do Ragnar, is for you" it then shows Lagatha and than Ragnar points at Floki and Ragnar says "Let's empty the boats." The camera then shows King Harold and you can see Rollo standing behind King Harold when he should be with the French. (00:10:33)
Suggested correction: It is not Rollo.
The Vision - S4-E12
Continuity mistake: Shots from inside the boat show all 3 boats without sails, but aerial views and shots from behind the boats shows them with sails. (00:36:30 - 00:38:40)
Continuity mistake: They take away the ropes around his neck. When King Aelle start to hit him, the ropes appear around his neck again, when the shot changes to shortly after the hit, the ropes are gone again. (00:29:00)
On the Eve - S4-E19
Continuity mistake: When Torvi shoots the man that was running toward her, the man falls and the arrow is in his chest but in the next shot the arrow disappears. (00:03:22)
