Chloramphenicol (The Americans)

"Chloramphenicol" is the fourth episode of the fourth season of the American period spy drama television series The Americans. It is the 43rd overall episode of the series and was written by Tracey Scott Wilson, and directed by Stefan Schwartz. It was released on FX on April 6, 2016.

The series is set during the Cold War and follows Elizabeth and Philip Jennings, two Soviet KGB intelligence officers posing as an American married couple living in Falls Church, a Virginia suburb of Washington, D.C., with their American-born children Paige and Henry. It also explores the conflict between Washington's FBI office and the KGB Rezidentura there, from the perspectives of agents on both sides, including the Jennings' neighbor Stan Beeman, an FBI agent working in counterintelligence. In the episode, Philip and Elizabeth are forced to quarantine with Gabriel and William, while Nina awaits her sentence. Meanwhile, Martha is targeted by Stan and Aderholt.

According to Nielsen Media Research, the episode was seen by an estimated 1.04 million household viewers and gained a 0.3 ratings share among adults aged 18–49. The episode received universal acclaim, with critics praising Annet Mahendru's performance and the end to Nina's arc.