In 1950, Nielsen Media Research began compiling its ratings of the top shows on television. For the past 70 seasons, networks have been scrapping for that No. 1 spot. And at the end of each season, one fortunate title has sat atop the throne.

The following dozen titles were all the highest-rated series of a television season sometime between 1950 and 1979. (Only Gunsmoke spanned decades, ranking No. 1 from 1957–58 to 1960–61.)

See if you can place them into the correct decade. Good luck!