The Mikaelson family reunion that fans have been anxiously waiting for will finally take place in the next all-new episode of "The Originals."

In the upcoming episode, "Every Mother's Son," Esther will arrive to New Orleans and invite her estranged sons over for dinner. Esther, who has resurrected herself in the body of teenage Harvest girl Cassie, will also show up and reveal haunting family secrets, reports Wet Paint.

"It's definitely a family reunion full of surprises," showrunner Julie Plec teased in a promo video.

"This episode is really in a way the family reunion that we've been promising. It's Cassie literally inviting her children to join her for dinner."

More of Esther's backstory, including the fact that she lost two of her seven children, will be unveiled in the episode. In addition, viewers will get to see actress Alice Evans reprise her famous guest-star role.

"This will be the big episode where Esther is going to make her modus operandi clear to her sons," executive producer Michael Narducci said.

However, before attending the suspicious family dinner, Elijah, Klaus and Hayley will seek help from new witch Lenore. Hayley also appears to want to use the dinner as an opportune time to seek revenge against the wicked witch.

In the meantime, it appears that Elijah takes Marcel's advice and reluctantly begins to mentor Gia. Eventually, the two will team up together.

According to Dread Central, the CW released a synopsis about the episode, which states:

"When Klaus (Joseph Morgan) and Elijah (Daniel Gillies) receive a cryptic invitation to dinner from their mother, Esther, who continues to inhabit the body of Harvest girl Cassie (guest star Natalie Dreyfuss), they find themselves preparing for the worst.

"With the help of a new witch named Lenore (guest star Sonja Sohn), Klaus, Elijah, and Hayley (Phoebe Tonkin) attempt to stay one step ahead of Esther, but things quickly take an unexpected turn. While Elijah finds himself reluctantly teaming up with Gia (guest star Nishi Munshi), a newly-turned vampire, Hayley is faced with an enticing proposition about her new status as a Hybrid after a startling encounter with Esther.

"Finally, Esther reveals a shocking secret about Klaus' childhood and unveils her ultimate plan for her children."

"The Originals" Season 2, Episode 3, "Every Mother's Son," premieres Monday, Oct. 20, at 8 p.m. ET on The CW.

Watch the official trailer and teaser videos below.