Continuity mistake: At the beginning of the duel scene, when Roan and Lexa lock swords, they do so with each sword pointing to their holders' right. During the shot of Lexa being forced to her knees while Roan tells her to get down, though, both swords are pointing to their holders' left, and Roan can be seen holding his with his right hand instead of his left like he does in the rest of the scene. (00:28:40)
Continuity mistake: At the very beginning of the duel scene, Roan starts running towards Lexa holding his sword in his left hand. In the following shot he can be seen running with the sword in his right hand, while when they finally collide he's back to holding it with his left. (00:28:25)
Continuity mistake: In the very first scene when we enter Clarke's room from outside the window, you can see bars/old window frames in it. In the next shot, from inside the room, you can plainly see that it looks like an open balcony without any of the previous structures. (00:01:15)
Continuity mistake: When Clarke gives Lexa Anya's braid, we see Lexa accepting it with her left hand and then holding it with both. The next time she's on screen, though, you can see her holding it in one hand, still withdrawing from Clarke. In the following shot, she has the braid in both hands once again. (00:29:10)
Continuity mistake: When Lexa enters the throne room for the meeting with the ambassadors from the 12 clans, after she reaches her throne she stands in front of it, holding her hands behind her back. In the following shots, her hands keep switching from behind her to in front of her, to at her sides. (00:03:45)
