Pratt gets cold feet when Bettina (Gina Ravera) gets serious about their relationship; Neela joins a hockey team; a prison doctor visits the ER.

Abby checks out of rehab and finds her way back to the ER; Harold finds new confidence after a big night with Neela's cousin; multiple victims of a fire come in.

Sam finds that she has much in common with a patient; a woman (Gloria Reuben) rushes her son to the ER after he falls in gym class; the hospital higher-ups refuse to take Pratt... Full summary

Luka and Abby make plans to go to Croatia after his father dies; a man (Peter Fonda) comes to the hospital after his wife's car accident and meets someone from his past; Julia holds a... Full summary

Abby feels uncomfortable when Luka's brother visits from Croatia; Gates feels the pressures of fatherhood when Sarah decides to host a sleepover; the appointment of a temporary head of... Full summary

Gates and Julia nurture their newfound romance, but a troubling phone call interrupts them; the other doctors notice that Abby is off her game; Harold saves the day in a critical... Full summary

Rolling brownouts hit Chicago; Morris buys an energy-efficient car; Abby and Pratt disagree on a fussy baby's diagnosis; with Kovac in Croatia, Abby gives in to temptation.

Morris and Pratt cram for their medical boards when Morretti brings in a new attending physician (Kari Matchett) to help with the load; Sam and Abby work on an attention-hungry patient... Full summary

Moretti (Stanley Tucci) decides that Gates is ready to return to the ER; Neela must mentor a young genius intern (Steven Christopher Parker); Morris has a hard time resisting women... Full summary

A former patient decides to provide free beauty treatments in the ER; Joe visits the ER after a fall from a jungle gym; Gates makes a terminally ill boy's baseball dream come true.