Weaver considers drastic action to keep Lopez's folks from taking custody of Henry. Abby is in the midst of her psychiatric rotation and tries to help a seizure-prone mother with a controversial drug treatment. Pratt lays into Neela for avoiding the ER to work in a lab. Kovac's relationship with Sam and her son Alex grows awkward when Alex' father returns. Carter impresses a returning Kem - but annoys his father - with a shake-up at his family's foundation.