Note that it may still be copyrighted in jurisdictions that do not apply the rule of the shorter term for US works (depending on the date of the author's death), such as Canada (50 p.m.a.), Mainland China (50 p.m.a., not Hong Kong or Macao), Germany (70 p.m.a.), Mexico (100 p.m.a.), Switzerland (70 p.m.a.), and other countries with individual treaties.
Publicity photo of American actors, (L/R) Christopher Knight, Robert Reed, Don Drysdale and Mike Lookinland promoting their roles on the the ABC comedy series The Brady Bunch, episode entitled "The Dropout", circa September 3, 1971.