The episode introduces Devon (played by Carolyn Michelle Smith), Will's former FBI partner. Flashbacks show their strained relationship due to Will's suspicion that she was a "dirty" agent before the occupation. Narrative Structure

The episode provides a "big reset" by showing the chaos and terror as the Hosts arrived, including the physical descent of the Wall segments from space to isolate Los Angeles.

While the bulk of the episode focuses on the past, it concludes by jumping back to the present. Will is shown in the Santa Monica Bloc searching for his son, Charlie, eventually reuniting with Devon to ask for her help.