The CW has released a new trailer for Riverdale Season 2, which teases a dangerous war brewing in the once-sleepy town. A lot has changed since fans were first introduced to these characters in mid-season, and with the show switching gears to this fall, we can expect a lot more in the way of steamy excitement. These high schoolers were a bit hit with fans, giving the iconic Archie Comics a much darker edge. This new trailer teases that no one in Riverdale is safe, not even Archie Andrews (K.J. Apa).

The first season of Riverdale found our heroes reeling from the tragic death of high school golden boy Jason Blossom. For many who saw Riverdale as perfect, safe, and innocent, the investigation into Jason's murder peeled back the layers of their hometown to reveal a place bubbling over with secrets, mysteries, and scandals. Archie Andrews, for instance, grew from a sweet, all-American kid into a young man acutely aware of the darker side of life, he broke his best friend's heart, had a forbidden relationship with his music teacher, and grappled with whether he wanted to follow in his dad's salt-of-the-earth footsteps. The new trailer debuted on The CW YouTube earlier today, which ends with quite the shocking revelation. Archie Andrews carrying a gun.

RELATED: Riverdale Pays Tribute to Luke Perry in New Episode and Fans Are an Emotional Mess

On the positive side, Archie repaired his friendship with Jughead Jones (Cole Sprouse), found some success as a musician, thanks in part to Josie McCoy (Ashleigh Murray) and her band, The Pussycats, and found a new romantic interest in femme fatale Veronica Lodge (Camila Mendes). New to town, Veronica spent the season trying to atone for her "bad girl" past, all the while wrestling with her beloved father's criminal legacy, and contending with a mother, Hermione (Marisol Nichols), who might not be as innocent as she claimed. Veronica became fast-friends with Archie's girl-next-door neighbor, Betty Cooper (Lili Reinhart), who did some growing up of her own this season. After Archie's rejection, Betty threw herself into running the school paper, "The Blue and Gold," where she discovered a better romantic match in sardonic outsider Jughead.

Together, they tracked down Betty's sister Polly (guest star Tiera Skovbye), who had been sent away by their overbearing mother Alice (Madchen Amick). Under the guise of writing for the school paper, Betty and Jughead investigated Jason Blossom's death, which led them to discover that Jughead's father, FP Jones (guest star Skeet Ulrich), was involved with covering up Jason's murder. Meanwhile, Jason's twin sister Cheryl (Madelaine Petsch) ruled the school as Riverdale High's venomous, merciless Red Queen, until she learned the true identity of Jason's killer. As the town breathed a collective sigh of relief that Jason's killer had been found out, another terrible crime occurred, in a space that had been considered one of the town's safest, most innocent places. If Jason Blossom's murder revealed the slimy underbelly beneath Riverdale's surface, as we enter Season Two, the shooting of Fred Andrews threatens to plunge the entire town into utter darkness.

The first season also featured Molly Ringwald as Archie's mother Mary, and it was confirmed this summer that she will be back for Season 2. Based on the characters from Archie Comics, Riverdale is from Warner Bros. Television and CBS Television Studios, in association with Berlanti Productions, with executive producers Roberto Aguirre-Sacasa (Supergirl, Glee), Greg Berlanti (Arrow, The Flash, Supergirl, DC's Legends of Tomorrow), Sarah Schechter (Arrow, The Flash, Supergirl, DC's Legends of Tomorrow) and Jon Goldwater (Archie Comics). Take a look at the new trailer and poster for Riverdale Season 2 below, debuting October 11 on The CW.

Riverdale Season 2 Poster