Chapter 13 - S1-E13
Revealing mistake: Zoe's phone "rings." The phone can be seen flipping the image from horizontal to vertical, something that only happens with pictures, not calls. This, plus the static effect in the "slide to unlock" reveals that it is not a real call but a screenshot made for the scene. (00:19:39)
Chapter 43 - S4-E4
Revealing mistake: After Underwood and Meechum are both shot, other agents pick up the president to transport him to a hospital. Agent Meechum is lying on his back with eyes open. Another agent takes his firearm and checks his carotid artery. Since the agent walks away from Meechum, it's assumed Meechum is dead. However, Meechum is still breathing. (00:21:40)
