They call the serial killer the "Pied Piper" because of the age of the victims, often teenaged. There is a fictional legend concerning a piper who dressed in multicoloured clothing who led children away from the town of Hamelin only to never return, and thus were thought to have died. This version of the tale was used to prevent disobedience but was transformed into a fairy tale for children.
"Pieces of Me" by Dying Regret (the raid on Goldie's place)
Episode Title: Holder cites the name of a legendary Native American leader, Hiawatha, who according to historical accounts banded together six nations of native tribes in response to European colonization. Hiawatha's actions led to the formation of the Iroquois Confederacy.
The actress who plays "Aleena Drizocki," the escort who visits Holder at the end of the episode played "Meg" in Veronica Mars, another TV show centered around a murder mystery.
When Sarah runs along the waterfront and hears a ferry boat's horn she sees a nearby signboard that displays the vessels' names, Adela and Veena. Veena Sud is the developer and executive producer of The Killing.
Goof: Linden follows Holder and his sponsor Gil to the Narcotics Anonymous meeting and watches as they exit Gil's car. As they do so, we can see that the tail lights and the backup lights are on. The only time a car's backup lights are on is when the car is in reverse gear so it would seem Gil put the car in reverse instead of park before he turned the car ignition off. Being on a slight incline and without being in park, the car could have rolled backwards.
Goof: The end of Bennet Ahmed's letter to Rosie reads "Whatever the mood or the circumstance, the essence of it's quality may linger in the silence that follows. It is a soundless echo." He misspelled the possessive pronoun "its", which would be unusual for an English teacher. It's is a contraction for "it is" or "it has".
Goof: When Stan Larsen agrees to make his sons a dinner of chocolate chip pancakes, he tells son Tom to get him an egg and some milk. The next thing we see is Stan already pouring the milk as son Tom arrives from the refrigerator with only an egg.
When Linden is watching the video of Rosie in the office and talking to Jack, she pauses the video on Rosie with her head turned and a closed smile. When the camera shot goes back on the frozen screen, the scene is Rosie facing front with a full smile, which is the scene prior to the one where Linden paused the film.
Richard Harmon (Jasper Ames), Liam James (Jack), Kacey Rohl (Sterling Fitch), Katie Findlay (Rosie Larson) have all previously guest starred on Fringe, which is also shot in Vancouver.
The animal Sarah Linden finds dead on the water's edge during her jog is a seal. It did not seem to have any fur. Perhaps someone had skinned it.