The Marvel Cinematic Universe (MCU) television series are American superhero television shows based on characters that appear in publications by Marvel Comics. The shows have been in production since 2013, and in that time Marvel Television and ABC Studios, along with its production division ABC Signature Studios, have premiered five series, with six more in various stages of development, across broadcast, streaming, and cable television. The broadcast series that air on ABC have averaged around 7–8 million viewers a season, with all MCU series receiving strong critical responses.