On the red carpet at The CW’s Fall season event, Danielle Panabaker (Caitlin Snow/Killer Frost) tells Access about the upcoming adventure on “The Flash” for her character and Ralph Dibney to uncover the truth about Caitlin’s dad. And, Candice Patton (Iris West) chats about the show finally exploring “The Flash Vanishes” story line. “The Flash” airs Tuesday nights at 8/7c on The CW.