11 details you may have missed in the final trailer for 'Stranger Things 3'

"Stranger Things" released the final trailer for its third season. In the trailer, we got a good look at the roles of characters like Eleven, Billy, and Will would be in this season. We also got a glimpse at what new monsters might be invading Hawkins now, including another peek at the terrifying Mind Flayer. The new season premieres on Netflix on July 4.