Continuity mistake: When Jeanine looks at Tris' tattoo, there is hair covering the top of her ear. A few shots later, the hair covering her ear is suddenly behind her ear with only a strand of hair left over it. Then the hair is suddenly back to covering her ear as Jeanine goes to leave.
Audio problem: As Beatrice and Caleb are walking through the streets, Caleb asks Beatrice "What if she'd been blind or an amputee? Would you have helped her then?" and Beatrice replies "I was thinking about helping her." Neither their lips nor jaws ever move during both these lines.