Mycroft shows up in New York to ask Holmes and Watson to solve a case concerning his former fiancée. Mycroft and Joan's relationship is a source of contention with Sherlock.
When a murdered scientist turns out to be Dr. Eugene Lustig, the man who helped Carrie understand her gift, she sets out to find the other study subjects in the hopes of uncovering something that will help her solve the case.moreless
Francis returns to his alma mater to have a library dedicated in his name. Peter Russo goes home to Philadelphia to make amends to the shipyard workers who lost their jobs and to propose a solution for the future.moreless
Cathy fights with Joy; Paul gets a surprise concerning his wife.
The Fringe team visits a widow who is connected to a mysterious event. Meanwhile, Peter and Olivia try to resolve the issues between them.
The investigation into an illegal social club fire which claimed 53 fatalities leads to a connection between arson, undocumented immigrants and the sale of green cards.