When you watch The Flash Season 1 Episode 15 online via TV Fanatic, you will meet Mark Mardon, brother to Clyde Mardon. He's not a happy camper. Of course, if you watch Jim Gaffigan, you know there are no happy campers, but that's a different story entirely. A good one, but completely different. This unhappy Weather Wizard sets into motion a series of events that will alter time. While he doesn't know it, he's actually saving a life or two or three in the process. Surprise Mardon, you're not the bad guy you thought you were! Find out how it all plays out when you watch The Flash online by clicking above.