Following last night's intriguing installment in the new Archie Comics-inspired mystery drama "Riverdale," the CW released a promo for the next chapter in the unfolding murder mystery. The promo puts Archie right where longtime comics readers probably never expected to see him: under interrogation.

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The episode, titled "Chapter Three: Body Double," will see the mystery of Jason Blossom's death deepen as Archie and his classmates struggle to uncover the truth. The episode will also add "Stranger Things" alum Shannon Purser (a.k.a. Barb) to the Riverdale class in the role of Ethel Muggs.

THE GIRL WHO CRIED SHOTGUN — After new information surrounding Jason’s death comes to light, Cheryl (Madelaine Petsch) finds herself under a cloud of suspicion and forced to come clean about the last time she saw her brother. Meanwhile, Archie (KJ Apa) makes a tough decision that puts a major strain on his relationship with Miss Grundy (guest star Sarah Habel). Elsewhere, Betty (Lili Reinhart) decides to revive the school newspaper and asks for Jughead’s (Cole Sprouse) help in investigating Jason’s death, while Veronica (Camila Mendes) and Ethel (guest star Shannon Purser) work on exposing some of Riverdale High’s football players after rumors of a “shame book” begin to circulate. Finally, after getting grounded by his dad Fred (Luke Perry), Archie must figure out a way to make it to the Taste of Riverdale event where Josie (Ashleigh Murray) and the Pussycats will be performing a song he helped write.

Starring K.J. Apa as Archie Andrews, “Riverdale” airs Thursdays at 9 pm on The CW. The series also stars Cole Sprouse as Jughead Jones, Camila Mendes as Veronica Lodge, Lili Reinhart as Betty Cooper, Ross Butler as Reggie Mantle and more. “Breakfast Club” alum Molly Ringwald also recurs as Archie’s mother Mary.