What is the fine-grained topic of the following text: Plus, take a look back at Mighty Morphin Power Rangers 25 years after the imported series debuted in the United States, and watch a short film by Pixar behind the scenes documentary filmmaker Erica Milsom. Only return the topic.
Review and retrospective of the Mighty Morphin Power Rangers series and a short film by Pixar's Erica Milsom.