On this week's 300th episode: Morris makes a bet that the ER will take in 300 patients before the next shift comes in, Julia leads the staff in a blessing ceremony, Sam's transport training goes sideways after her ambulance is in an accident, Neela has to swab a camel's mouth after it bites Dubenko, Pratt helps a family after a wife and son are in a bad car accident, and Abby's finally reveals her drinking to Luka as they prepare to go to Croatia.