Dr. Carter, Abby and other staff of the ER are quarantined as the CDC investigate a mysterious, deadly outbreak.

When Vic discovers that Ronnie has been burned as payback, the rest of the team does everything they can to put an end to him. Meanwhile, Claudette makes headway on…

Trouble arises on the set of a commercial; Harry tries to gather support for a controversial sponsorship; Betty and Don try to appease a client with a friendly dinner.