The Southern Raiders

This is the unaired 16th episode of Book Three.

Setting Speculation
From the title it has been speculated that this episode will provide more information about the raid of the Southern Water Tribe in which Katara and Sokka lost their mother. This was confirmed during the New York Comic Con, where this episode was said to be very intense and "a real tear-jerker". It will feature flashbacks of Katara and Sokka's past, showing them as small children, and will most likely present the first accurate description of their mother in the series. It is believed that her name will also be revealed.

Series Continuity

 * This is the first time in the series that more information will be released about the mother of Katara and Sokka.

Fan Theories

 * Katara and Zuko will separate from the group and attempt to enter somewhere or perform a task. The two have been seen in trailer scenes wearing dark clothing and moving stealthily to do these possible things:
 * To locate the Southern Raider Fire Nation soldiers that killed Sokka and Katara's mother
 * Zuko gets information on the where-abouts of his own mother Ursa.
 * If the Zuko/Katara mission episode is true it would match a pattern the previous episodes setup, where Zuko joins one member of the group to perform some mission. Examples: Zuko and Aang go to find the source of firebending in "The Firebending Masters", and Zuko going with Sokka to save Hakoda in "The Boiling Rock".
 * Katara has been seen in trailer scenes (possibly related to this episode) bending rain.
 * Some have suggested Katara will bloodbend again and that Zuko may finally create lightening but there is little to confirm this, except showing Katara in a Bloodbending stance in the NYCC Trailer.
 * Hakoda, Teo, Haru, The Duke and Chit Sang leave the group for some reason.
 * Katara will finally let go of her hatred and mistrust of Zuko, she has already acted less vindictive to him and the cooperation will be necessary if they are to work together on a secret mission.
 * During or after this episode, Zuko will probably tell the Gang of his mother's fate and her relation to Avatar Roku.
 * Former characters like Hama may return.