On September 24, 2013, Marvel's Agents of S.H.I.E.L.D. had its series premiere on ABC. It was the first series produced by Marvel Television and was meant to be the first television show to take place within the Marvel Cinematic Universe. In the years that followed, its connection to the larger franchise grew weaker, and many no longer consider it part of the main universe. Even with its place in the canon in question, it may just be the MCU's best foray into television.
Source：https://www.cbr.com/agents-of-shield-10-year-anniversary/
