Who we will see again in episode 100?

As the website Imdb says, we could probably see known faces in episode 100.

Janina Gavankar (Tessa), Sara Canning (Jenna), Matthew Davis (Alaric), Daniel Gillies (Elijah), Claire Holt (Rebekah), Joseph Morgan (Klaus), Kayla Ewell (Vicky) and Malese Jow (Anna), appear at the list as part of the cast for this episode.

With which we are thinking if they could be flashbacks, be the result of the instability of the veil or the position of Bonnie as anchor. We must remember that the information of this page, although at other times it has been confirmed, is not 100% reliable.