Warning: The following contains spoilers for USA's "Mr. Robot."

No one would say that the first season of "Mr. Robot" was a happy-go-lucky fun time adventure. In fact, everyone would say the exact opposite. Between the string of murders, the constant threat of cyber terrorism and in-depth examinations of drug addiction and mental health, "Mr. Robot" was about as far away as you can get from pleasant and uplifting.

It was also damn good television.

What made "Mr. Robot" so unique beyond its non-traditional structure and format was the innately grim tone, a foreign vibe for the usually cheery USA Network. That same approach will extend even further in season two.

"It gets really f------ dark. I mean, really dark," creator Sam Esmail said during a recent interview.

That's saying something. Season one capped off with Rami Malek's Elliot learning that Mr. Robot (Christian Slater), the leader of the cyber terrorism group FSociety, is his father and a figment of his imagination. Yet Elliot's cracked psyche is only the beginning. Originally conceived as a film, Esmail says "Mr. Robot" is just getting into the good stuff now.

"It is about what happens after Elliot discovers that Mr. Robot is a deeper, alter ego. We're staying on track in regards to what the end of the movie would be," Esmail said at Paley Fest in New York City.

"Mr. Robot" was the surprise sleeper hit of this summer's television season. Critics gave it glowing reviews due to its unique style, strong acting and guessing-game plot. In the crowded space of cookie-cutter TV shows, "Mr. Robot" really stood apart from the pack thanks to its strange and original voice. Audiences agreed as the show's first season garnered a fantastic 98 percent on Rotten Tomatoes.

Season two is expected to debut sometime in summer of 2016.