[Spoiler] "Duel" Yang Se-jong's perfect double role

Yang Se-jong is playing double roles.

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On the latest episode of the OCN drama "Duel", Lee Seong-joon (Yang Se-jong) reacted aggressively to his own picture.

Jang Deuk-cheon (Jung Jae-young) claimed Lee Seong-joon has a twin and asked for an investigation on his accomplice. In the end, Choi Jo-hye decided to conduct a lie detector and brain wave check.

Lee Seong-joon didn't react to any picture. Choi Jo-hye was about to end the check when Jang Deuk-cheon asked for one more picture.

Two pictures that looked like Jang Deuk-cheon appeared and his brain wave started going mad. He was very anxious and showed aggressive signs. He started to cry and held his hands in a tight fist.

He screamed, "Help! Don't do this!" and was frightened to death about something. The medics gave him a shot to calm him down.