When you watch The Flash Season 1 Episode 3 online, you will meet Kyle Nimbus who becomes The Mist. He is evil for the sake of being evil and becomes a gas. You will also get to know more about Caitlin because when Joe goes to STAR Labs to make a request for a new type of prison to hold these super criminals, Cisco suggests the particle accelerator. Caitlin hasn't been there since Ronnie Raymond died, and she is not eager to go again. Barry listens to her tale of her romance and the man Ronnie was and Caitlin is fleshed out as a character. Joe is fully on board with helping Barry discover who killed his mom and freeing Henry, so much so that he takes the files out of storage and reopens the case. he then goes to the prison to see his old friend, something he hasn't done in many, many years. Iris is still intrigued by the red streak, but she also makes the decision to come out about her relationship with Eddie. Find out who The Mist is targeting and who almost dies when you take the time to watch The Flash online.