Charles Aitken

After communications with the president's plane are lost, Elizabeth is sworn in as the acting president. Henry is asked to recruit one of his students for the NSA.

When dealing with the Russian government, the president's administration comes across hostility. Dmitri is interrogated about being a spy.

Crane looks to his past for a connection when a monster resembling the mythical New Jersey Devil attacks Sleepy Hollow; Joe and Jenny stumble as they navigate their relationship; Abbie struggles in the wake of her trauma.

Thackery's connection to Captain Robertson, and how he arrived at The Knick, is revealed. The conflict between Edwards and Gallinger comes to a head after a medical-board hearing regarding Gallinger's vasectomies. Cornelia and Henry weigh the cost of a family crisis.

Thackery introduces a new kind of cure to his inebriation ward and performs further plastic surgery on Abby. Brockhurst demands the return of his "girls". Cornelia presents evidence of the company's wrongdoing to Henry. Barrow's troubled marriage comes to a head.