This week: Abby finally gets a lead on Eric\u2019s whereabouts, Susan defends Chuck after he messes up an intubation on the air rescue chopper, Luka\u2019s surgeon friend from Croatia gets caught up in the ER vortex, Romano is clamping down on ER wait times, Pratt gets to live out every disgruntled worker\u2019s fantasy, and Carter is devastated after the sudden passing of his grandmother.