I Did Kill You, Didn't I?

In the aftermath of a traumatic event, Veronica spontaneously departs on a road trip with a troubled visitor, leaving her coworkers worried about her safety. At Mercy, a horrific bus bombing results in a chaotic ER, with a clashing Briggs and Sands scrambling for available space. Meanwhile, Chloe suffers from a hangover; Sonia tries to keep her infidelity a secret.