THE FLASH BATTLES THE MIST, CAITLIN TELLS BARRY ABOUT RONNIE: As Barry (Grant Gustin) and The Team at S.T.A.R. Labs work to capture Kyle Nimbus (Guest Star Anthony Carrigan), a.k.a. The Mist, a dangerous new Metahuman with toxic gas powers, they revisit the painful night The Particle Accelerator exploded and killed Caitlin’s (Danielle Panabaker) fiance, Ronnie (Guest Star Robbie Amell). Meanwhile, Joe (Jesse L. Martin) decides to finally visit Henry (John Wesley Shipp) in jail after all these years, but things take a dangerous turn when Kyle shows up looking to punish Joe for arresting him years ago. Meanwhile, Iris (Candice Patton) and Eddie (Rick Cosnett) continue to hide their relationship from Joe. Jesse Warn Directed The Episode Written by Alison Schapker & Grainne Godfree.