Revealing mistake: When they are spearing fish near the start, a water drop goes from the water to the spear, showing that it is reversed. (00:04:34)
Vikings (2013)
1 revealing mistake in season 1
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.