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)