This week we are discussing CODE BLUE. This is in-hospital cardiac arrest in an adult patient. I discuss what a code blue is, who the members of the code team are and what their roles are, what we do during a code to attempt to resuscitate. I also talk about the reasons why someone’s heart may have stopped. Finally, I explain the two different outcomes for the code: either the patient survives (ROSC: return of spontaneous circulation) or time of death is called.