Fringe: And Those We Left Behind

"And Those We've Left Behind" is the sixth episode of the fourth season of the Fox science-fiction drama television series Fringe, and the series' 71st episode overall. The episode dealt with the Fringe team's investigation of a series of time loop fatalities. Robert Chiappetta and Glen Whitman co-wrote "And Those We've Left Behind", while Brad Anderson directed. Real-life husband and wife Stephen Root and Romy Rosemont guest starred as a married couple behind the time loop, one an electrical engineer and the latter a professor of theoretical physics. The episode first aired on November 11, 2011 in the United States to an estimated 3.07 million viewers. Its 1.1 ratings share for adults 18-49 resulted in a series low. Critical reception was generally positive, as television critics in particular praised the performances of guest stars Root and Rosemont.