Amber 31422

"Amber 31422" is the fifth episode of the third season of the American science fiction drama television series Fringe. It first aired on November 4, 2010 in the United States. The third season spent its time alternating between the prime and parallel universes, and "Amber 31422" was set in the latter. Olivia, still trapped in the Other Side and brainwashed, investigates the Rose brothers, who are able to do the seemingly impossible: escape from an amber-like substance used to contain fringe events.

The episode was written by Josh Singer and Ethan Gross, and directed by David Straiton. An estimated 4.97 million viewers watched "Amber 31422", which up to that point were the lowest ratings of the season. Critics were generally positive, and many praised the cast's performances as well as the Rose brothers' storyline.