Season 4 Episode 2 - 히어로즈 and Villains 

When an ex-con is mysteriously slain in an alley, 성 and Beckett believe a vigilante is behind the murder. But efforts to identify their suspect are thwarted when they discover that he roams the city in a Superhero costume
키워드: 성, season 4, episode 2, 히어로즈 and villains, full episode, abc