In this issue of Pediatric Clinics of North America, guest editors Drs. Mary Lieh-Lai and Katherine Cashen bring their considerable expertise to the topic of Pediatric Critical Care. The most common indications for admission to the PICU include respiratory disease, cardiac disease, and neurologic disorders. In this issue, top experts in the field provide current clinical knowledge about these admissions as well as other important critical care admissions, including COVID-19.