Scott and Archer diagnose a pregnant woman with a serious infection; Maggie receives shocking news; Halstead and Charles question an elderly patient's Alzheimer's diagnosis; in an effort to help a patient, Marcel takes a risk.
A citywide blackout during a code black causes chaos. Heather and Elliot are stuck in an elevator with a woman in labour.
Cricket and Blake interview surrogates; Amanda acquires a job; Sharon learns a weight-loss secret; Pastor Tudor shocks the congregation when he tells them to get frisky.
