The shows include Charmed and Legacies, both for a second season, and Arrow (Season 8), Black Lightning (Season 3), DC's Legends of Tomorrow (Season 5), Dynasty (Season 3), The Flash (Season 6), Riverdale (Season 4), Supergirl (Season 5) and Supernatural (Season 15).
CW president Mark Pedowitz made the announcement Thursday during the TCA winter press tour in Pasadena.
"This season, we expanded our primetime schedule to six nights with the addition of Sunday - which has been an unqualified success for the network, our affiliates and our advertisers. In addition to growing our schedule across the week, we also continue to add more year-round programming. The early renewal of these signature CW series gives us a head start on laying out the 2019-2020 season, and this is just the beginning. These shows provide a strong foundation for our multiplatform programming strategy, and we look forward to building on this with even more returning and new shows as we approach the May upfront", said Pedowitz.