And Those We Left Behind
All over Boston, time anomalies are occurring, looping back four years. The Fringe team traces the anomalies back to a married couple of scientists, Raymond and Kate Green. Raymond has used his wife's research to construct a machine that reverts their home four years back in time, before she fully suffered from rapid deterioration of Alzheimer's disease. He has been convincing her younger version to complete her research to allow him to stabilize the time bubble. With help from Walter, Peter enters the house, and he and Kate persuade Raymond to shut down the machine, which is later disassembled by the FBI. Raymond intends to rebuild it later, but he discovers that Kate has blacked out all the equations she had written down. In the end, Peter notes that the husband's success with the time bubble started simultaneously with his own appearance in the alternate timeline.
