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Valerie is shocked when a unexpected guest visits her.
The campus enters lockdown after their's reports of a gunman on the loose, forcing Daniel to take action. Rob is involved in the case as well and it looks like the patient may in fact be a patient in the surgery's waiting room.
Heston and Ruhma witness a tragedy and have to deal with the consequences. Ayesha confronts Ike about his motives. Esewhehere Karen has an idea.