Two boys brought in after a fight at school leads Cleo to discover that one of them has been injecting himself with hormones. Hathaway's obstetrics nurse, Abby Lockhart, joins the ER as a third year medical student on an ER rotation.
Casts:
Parminder Nagra, Linda Cardellini, David Lyons, Angela Bassett, Maura Tierney, John Stamos, Scott Grimes