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02:48 — Severide rediscovers an emotional memory from Shay's past.
03:02 — A rooftop fire forces Casey and Dawson into an emergency exit plan.
02:39 — After she makes a devastating discovery that links her long-lost brother to a new case, Lindsay reaches out to Rollins from New York's SVU.
01:22 — Casey surprises Dawson with a romantic, rooftop proposal.