SSSS.Dynazenon is a 2021 Japanese anime television series produced by Trigger. It is the sequel to the 2018 anime SSSS.Gridman and the second installment in the shared Gridman Universe media established in 2018 after the 1993–94 tokusatsu drama Gridman the Hyper Agent by Tsuburaya Productions. The 12-episode series aired in Japan from April to June 2021.

SSSS.Gridman is a Japanese anime television series adaptation of the 1993–1994 tokusatsu series Denkou Choujin Gridman. The production is a joint collaboration between Tsuburaya Productions, the production company behind Gridman and the Ultra Series, and Trigger. It was broadcast for 12 episodes from October to December 2018. A sequel, titled SSSS.Dynazenon, was broadcast from April to June 2021.