Intelligence investigates when a young man is beaten and his fiancée is apparently abducted. Lindsay surprises Halsted with a big question. Cdr. Fogel takes Platt to task for going over his head to have Tay assigned to District 21.

Cal tries to understand his scar. A Calling leads Michaela to 828 co-pilot Amuta, who sheds light on what he saw. Ben makes an emotional connection.

Breaking into the Mutant Control Agency's headquarters to destroy the registration files on mutants, the X-Men lose two of their members against the Sentinels, but eventually gain another.

Breaking into the Mutant Control Agency's headquarters to destroy the registration files on mutants, the X-Men lose two of their members against the Sentinels, but eventually gain another.

Dr. Rhodes begins a fellowship in cardiothoracic surgery, only to have problems with his new boss. Dr. Choi is the new chief resident. Dr. Charles approaches Sarah with an interesting opportunity that catches her off-guard. April faces her recently discovered illness.

The team investigates a murder in which the victim appears to have been wearing a CPD-issued wire. Burgess works a case with a new partner. Crowley questions Lindsay about the night that Intelligence pursued Justin's killer.

When shredded remains of a man are discovered, evidence leads to multiple possible suspects.