Such Sweet Sorrow

Such Sweet Sorrow, known in Japan as '''Dreaming Power is our Future! The Biggest Dreamer''' (夢見る力こそ 僕らの未来) is the 51st and final episode of the Digimon Tamers series. It was aired in Japan on 03-31-2002, and in the United States in English on 06-08-2002; the English version was written by Adele Lim. Upon its premiere English airing on Fox Kids, it was combined with Jeri Fights Back to form an hour-long season finale.

Synopsis
Gallantmon digivolves into Crimson Mode and battles the Jeri Type Agent of the D-Reaper. After a fierce battle Gallantmon Crimson Mode finally destroys the Jeri Type Agent by punching his fist through it. Jeri Katou finally awakens from her long depression, realizing the meaning of destiny that she had sought since first meeting Leomon. Meanwhile, Sakuyamon energizes Justimon with the remains of her fighting energy in a failed bid to destroy the Cable Agent, which is finally killed by the Digimon Sovereign.

It is revealed that Janyu Wong has uploaded the Juggernaut program into Terriermon as part of Operation: Doodlebug; later, MegaGargomon activates the Juggernaut in the D-Reaper's vortex, which is located in the link between the two worlds. This causes the flow of the vortex to reverse direction (retreating back into the Digital World), but the protective effects of the red cards soon wear off, and the Biomerged Digimon are devolved into their respective composites, putting them in danger from the paralyzing effects of the D-Reaper. The combination of the fact that they are in a quantuam bubble and the reverse flow of the vortex creates a reverse time effect that devolves the D-Reaper back to its original harmless form as its sucked back to the Digital World. Also, Jeri and Calumon (who survived because Calumon somehow protected them with a forcefield) are saved by Takato and Guilmon who reach her by Guilmon flinging Takato to the two with his tail after they de-digivolve. Fortunately, they are then saved by MarineAngemon as the D-Reaper retreats.

During the end course of the battle, however, Janyu realizes that the Juggernaut program, in being a vital instrument of the defeat of the D-Reaper, would also create the same effect that was originally intended by Mitsuo Yamaki earlier in the series: it would force all the Digimon back into the Digital World. After the battle, as the phenomenon occurs to the horror and sadness of all the DigiDestined and their associates (with the de-digivolving of the Digimon into their training forms), Janyu reveals this detail to his son Henry, and apologizes to him for not having found out about the Juggernaut's side effects sooner. Henry then tearfully denies that there is a need for an apology, as he accepts this as the destiny of the Digimon.

Months later, Takato confides that life in Shinjuku has returned to a state seemingly like the times prior to the arrival of the Digimon and his first moments with Guilmon, as have the lives of the DigiDestined and their family and friends. However, the DigiDestined continue to remember their Digimon as promised during the return of the Digimon to their world. Takato, while strolling by the abandoned rest area in the local park where Guilmon made his home during his time in the Human World, decides to look into the hole that Guilmon dug when he first found an entry point into the Digital World. He is then shocked to find that the portal, which is assumed to have disappeared immediately after the Juggernaut program was used, has returned to view.