When you watch The Flash Season 1 Episode 18 online via TV Fanatic, you will get to see two of the character from Arrow cross over from Starling City to Central City. Say hello to Felicity and Ray Palmer! Felicity drives in and Ray flies to make things interesting and so references to Superman can be made. Friendships are forged across the board, but a relationship hits the skids. Can you guess which one it is? Well, it won't be too hard to do, so take a moment and just do yourself a gigantic favor and watch The Flash online via TV Fanatic!