It seems hard to believe but season three of Stranger Things was released 2-years ago. The pandemic caused the 4th-season of the series to take a pause, but filming is back underway and there’s a new trailer to prove it. In the new teaser, you find out that this time we’ll see what happened to Eleven in her past when she was the subject of government testing. Besides seeing the building that housed Eleven and others, the infamous Dr. Brenner is also seen in the minute-long trailer. According to series star Finn Wolfhard, this season will be a far cry from the 80s look of the third season and will be the darkest yet.