The second season of Riverdale premiered on The CW on October 11, 2017 and concluded on May 16, 2018 with a total of 22 episodes. The series is based on the characters from the Archie Comics, created by Maurice Coyne, Louis Silberkleit, and John L. Goldwater, and was created by Roberto Aguirre-Sacasa.
The principal cast sees KJ Apa, Lili Reinhart, Camila Mendes, Cole Sprouse, Marisol Nichols, Madelaine Petsch, Ashleigh Murray, Mädchen Amick and Luke Perry returning from the previous season, and introduces Mark Consuelos, Casey Cott, and Skeet Ulrich in starring roles. The season centres around a shooter known as "The Black Hood" who terrorizes the citizens of Riverdale.
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The series was renewed for a second season on March 7, 2017. Principal photography for the season began in June 2017 in Vancouver. On January 24, 2018, The CW announced the production of a musical episode for the season based on the Stephen Kings classic novel, Carrie. The episode, titled "" was first screened at the PaleyFest LA Spring Season in March 2018 and premiered on The CW on April 18, 2018, receiving positive reviews from critics.
On April 25, 2017, ahead of the first season finale, it was announced that Mark Consuelos had joined the cast to play Veronica's father, Hiram Lodge. Consuelos' casting, was in second position due to his co-starring role in the Fox baseball drama series Pitch, but that series was cancelled on May 1. A week later, Charles Melton was cast as Reggie Mantle, replacing Ross Butler, who originated the role during the first season, but left the show altogether due to his commitment as a series regular on 13 Reasons Why. That same day, Casey Cott was promoted to series regular as Kevin Keller.
On July 14, 2017, Brit Morgan of True Blood was cast to portray the recurring character of Penny Peabody. On August 11, 2017, Graham Phillips was cast as Nick St. Clair, Veronica's ex-boyfriend from New York.
The first trailer for the season was screened at the 2017 San Diego Comic-Con on July 22, 2017. The season premiered on The CW on October 11, 2017 and ended on May 16, 2018. The season debuted on Netflix in the United States on May 24, 2018, 8 days after the season ended its official broadcast on The CW; for Netflix in Latin America, the complete season became available on October 11, 2018, a year after it originally premiered in the U.S. The season was released on DVD & Blu-Ray by Warner Bros. on August 7, 2018.
The Complete Second Season was officially released on DVD in region 1 on August 7, 2018, by Warner Bros. Entertainment Inc. For region 2, it was released on August 20. The season was also released on Blu-ray for region A on August 7 by Warner Archives.
On review aggregator website Rotten Tomatoes, the second season holds an approval rating of 88% based on 15 reviews, and an average rating of 7.61/10. The site's critics consensus reads: "Riverdale enters its sophomore year with an off-kilter new murder mystery while continuing to up the hormonal teen melodrama."