Fans will finally learn more about Felicity Smoak's backstory in the next all-new episode of "Arrow" on Wednesday.

In last week's episode, Nyssa al Ghul returned to Starling City in order to fulfill her vow to avenge Sara's death. She and Oliver began to suspect that Malcolm Merlyn was responsible for killing her because Sara planned to reveal that he was still alive. However, Merlyn managed to convince Oliver that he was innocent when he swore on Thea's life that he didn't killed Sara.

Nyssa, however, did not believe Merlyn's story and set out to kill him. That's when Oliver put Merlyn under his protection, jeopardizing his relationship with Nyssa, the League of Assassins and Ra's al Ghul, himself, reports Hypable.com.

In the upcoming episode, "The Secret Origin of Felicity Smoak," viewers will learn more about Felicity's past in flashbacks when her mother unexpectedly comes town.

From the looks of preview photos, it appears that Felicity went through a Goth phase while she attended college at MIT, reports E! News. Fans will also be introduced to Felicity's ex-boyfriend, played by Nolan Funk from "Glee."

It was revealed in Season 2's "City of Blood" that Felicity was abandoned by her father as a child and has a strained relationship with her mother. "If I had accepted things, I would be a cocktail waitress in Vegas like my mother and I never would have gone to college and I never would have moved a thousand miles away to work at Queen Consolidated," she said, according to TVLine.

In the meantime, Ted Grant will question Laurel's motives for wanting to learn how to fight while Oliver will become upset when Thea uses the money that Malcom gave her to buy an apartment.

The official synopsis reads as follows:

"When a cyber attack brings Starling City to its knees, Oliver and Felicity are pushed to their limits to contain the destruction. Life gets even more complicated for Felicity when her mother, Donna (guest star Charlotte Ross), stops by for a surprise visit. Meanwhile, Ted Grant (guest star JR Ramirez) questions Laurel's motives, and Thea buys an apartment with Malcolm's "estate""money, which infuriates Oliver."

"Arrow" Season 3 Episode 5, "The Secret Origin of Felicity Smoak," airs on Wednesday, Nov. 5, at 8 p.m. ET on The CW.

Watch a teaser video below.