Diego Aguirre

Holmes and Watson try to work a stateside investigation from London when someone close to them is gravely wounded by an unknown perpetrator in the U.S.; Holmes' stateside legal trouble threatens to derail their efforts.

When Elizabeth discovers that the White House attackers had support from overseas, she tries to hunt down those responsible without starting a war; Henry meets one of the attackers.

Sharpe struggles when a case hits too close to home; Frome uncovers a patient's surprising past; Reynolds makes progress in his personal life after some difficult news.