Check out our video explaining the IT: Welcome to Derry footage that was showcased this past weekend at San Diego Comic-Con.

The nine-episode HBO series will serve as a prequel to Stephen King’s horror classic. 

Welcome to Derry kicks off its story in 1962 in the time leading up to the events of It: Chapter One (2017). The series is based on Mike Hanlon’s interludes from King’s book, which document “catastrophic events” from Derry, Maine’s past. Muschietti has teased that second and third seasons, if ordered by HBO, would take place in 1935 and 1908, respectively.

Taylour Paige (Zola), Jovan Adepo (“Watchmen”), Chris Chalk (“Perry Mason”), James Remar (Oppenheimer), Madeleine Stowe (Revenge) and Stephen Rider (Daredevil) will star in the upcoming series, with Bill Skarsgård returning as Pennywise the Clown.

Alixandra Fuchs (Hatfields & McCoys), Kimberly Guerrero (The English), Dorian Grey (Star Trek: Discovery), Thomas Mitchell (Gangland Undercover), BJ Harrison (Family Law), Peter Outerbridge (Saw VI), Shane Marriott (Fargo), Chad Rook (Billy the Kid), Joshua Odjick (Little Bird), Rudy Mancuso (The Flash) and Morningstar Angeline (Echo) also star.

Produced by HBO and Warner Bros. Television, developed for television by Andy Muschietti, Barbara Muschietti, and Jason Fuchs, “Welcome to Derry” is based on the novel IT by Stephen King. Andy Muschietti and Barbara Muschietti (through their Double Dream production company), Jason Fuchs, Brad Caleb Kane, David Coatsworth, Bill Skarsgård, Shelley Meals, Roy Lee, and Dan Lin are executive producers. Fuchs, who wrote the teleplay for the first episode, and Kane serve as co-showrunners on the project.