Cast Credits Investigation Couple (2018) Guest starring as Jang Yi Nam (5 episodes) Episode 1x08: Episode 8 (May 22, 2018) Episode 1x07: Episode 7 (May 22, 2018) Episode 1x06: Episode 6 (May 21, 2018) Episode 1x05: Episode 5 (May 21, 2018) Episode 1x04: Episode 4 (May 15, 2018) View 2 more View 2 less