You will Watch Teen Titans Episode 15 online for free episodes with HQ / high quality. Stream cartoons Teen Titans Episode 15 Every Dog Has His Day Being ignored by his busy teammates, Beast Boy feels lonely, so he wanders the town eventually turning into a green dog. To his surprise he crashes into another green dog that is being pursued by a flying saucer. The saucer picks Beast Boy up mistaking him for the real thing. Meanwhile, the other Titans have noticed Beast Boy has gone missing, and end up chasing the green alien dog, believing it’s their teammate.