The Fight that Never Ends

 is the sixth episode in Season 6 and 116th overall.

Synopsis
After escaping to the Dark Dimension, Elena tries to find Tatia for help, but is surprised to find out about her new allegiance. Having hard time to believe Misao's honesty, their conversation leads to Misao revealing her true agenda of changing sides. Meanwhile in Mystic Falls, Gwen finds a place to stay and continues her own research. Finally Inari seeks help from the gang to bring Elena back, but the confrontation quickly leads to violence.

Main Characters

 * as Elena Gilbert/Tatia
 * as Stefan Salvatore
 * as Damon Salvatore
 * as Caroline Forbes
 * as Bonnie Bennett
 * as Matt Donovan
 * as June Flemming
 * as Misao
 * as Inari

Recurring Characters

 * as Gwen Sawicki

Guest Starring

 * as Gas Station attendant
 * as

Special Guest Starring

 * as Klaus

Trivia & Notes

 * Matt Donovan returns to main cast in this episode.
 * makes her second appearance in The Vampire Diaries. She first appeared in the Season 2 episode .
 * , Isobel's research assistant from the Season 2 episode , is mentioned twice in this episode. She was the person Gwen was talking to on the phone, but she remained unseen and unheard.
 * Samara is mentioned, but remained unseen.

Behind the Scene

 * The episode features a verbal crossover with . During the scene before the final scene, Bonnie explains the non-verbal magic she cast as circle magic that she learned about from her distant relatives in Chance Harbor (the fictional town where the series take place), whom she got in touch with thanks to Samara. This twist confirms the the characters & the events of The Secret Circle as canon to the series. Also, Melissa Glaser is confirmed to be the distant relative in question of Bonnie.
 * This consequently creates several casting conflicts.
 * was cast as the angel Natalie in Season 4, even though she already played Diana Meade in The Secret Circle.
 * was cast as Antonio Wilder, Bonnie's love interest, in Season 4, even though he already played Grant previously.
 * Even though she doesn't actually play any physical role, 's image, who played Melissa Glaser, is being used as a symbolic image for the Earth Witch.

Cultural References

 * Stefan and Damon make a reference to , a 2010 film directed by Louis Leterrier and starring Sam Worthington.