With a name like Echo, it’s no question why it clings to your memory with a resounding effect. Luckily for actor Echo Kellum, you won’t have to ask for his name twice. Kellum stars in The CW’s hit superhero show Arrow and also may be best known as Tommy from FOX’s former show Ben and Kate. He’s come a long way from portraying a lead character’s best friend to now a superhero known as Mr. Terrific.