Sinkhole (S04E02)

Bash leaps into a sinkhole to rescue a pedestrian who is stuck. Mags struggles with a tough personal decision while working to manage a possible outbreak in the Emergency Department. Theo goes to great lengths to assist a boxer suffering from intense chest pain. June bonds with an unstable patient, crossing a line with Novak in the process. Meanwhile, Claire finds it challenging to cope after experiencing a previous assault.