Rick Cosnett returning to The Flash as Eddie Thawne Fresh off the news that Robbie Amell will be returning to The Flash as Ronnie Raymond, aka Firestorm, actor Rick Cosnett has revealed (via Twitter) that he will also return to the show as Eddie Thawn later this season. Given how Eddie previously perished in the season one finale, and has remained dead despite Barry’s near constant interference with the timeline, it remains to be seen how he will be returning, but sound off with your thoughts in the comments below! The Flash will return on Tuesday, Jan.