'Mr. Robot' Season 2 Spoilers: Are Christian Slater, Rami Malek Behind Elliot's "Door?"

The first season finale of Mr. Robot, aired on USA Network. In the upcoming Season 2, will audiences discover if it was Mr. Robot (Christian Slater), Angela (Portia Doubleday), or Tyrell Wellick (Martin Wallström) "knocking on Elliot (Rami Malek)'s door?"

In our previous recap, Elliot revisited his childhood with Mr. Robot, who is indeed his dead father. While Angela and Darlene looked for him, Elliot found himself staring at his father's tombstone. Fired from Evil Corp, Tyrell then paid a visit to Elliot and revealed how he committed the murder. After Elliot showed him FSociety's Coney Island hideout, Tyrell knew the two of them would be working together.

In our season finale recap, an Evil Corp executive blew his brains out on live television as FSociety launched its hack attack, eliminating the world's debt and spread its message viral. While Elliot was searching for Tyrell throughout the city, Angela was being seduced by the power and wealth of Evil Corp. Unable to control his hallucinations, Mr. Robot took full control of Elliot and gave him orders to follow.

In the post-credits scene, while someone was knocking on Elliot's door, we discovered the White Rose (B.D. Wong) was playing both sides as he was seen at a gathering for Evil Corp.

In an interview with TV Line, Mr. Robot creator, Sam Esmail, who recently announced his engagement to actress Emmy Rossum (Shameless), teased the identity of Elliot's guest, "What's great about that, because we obviously talked about it a lot, is that the audience is allowed to participate with us. Your imagination can run wild. There are a lot of possibilities that we introduce in the episode that could answer that question. The fact that the audience can theorize and put who they want behind the door and play that out is for me the fun part. So I'll answer your question like that!"

The question of Tyrell's fate continues as Esmail reveals, "Yeah, he's great.... I think I'm going to plead the fifth on that, so I don't spoil anything for anyone."

Mr. Robot will return to USA for the second season.

Readers, what did you think of the first season finale?