: Two patients collapse at the airport after arriving from Malaysia; symptoms include vascular rashes and rapid respiratory failure.

: While others deal with the virus, Glassman discovers his own personal crisis: his brain tumor has returned. Thematic Elements

The episode is frequently praised by reviewers for its intensity and for highlighting the limitations of Shaun’s savant syndrome when faced with extreme environmental stressors. It serves as a cliffhanger, leaving multiple lives—including Dr. Lim’s—hanging in the balance.