Main cast
Lee Jong-suk as Kang Cheol
A 30-year-old man, he is JN Global's co-president and owner of broadcasting channel W in a comic series world. He is a fictional character and the lead character of popular comic series, "W". His family died from an unknown killer, and Kang Cheol was immediately suspected to be the killer. He is, of course innocent, but still harbors the will to find the person who murdered his family. Kang Cheol immediately knows that Yeon-joo is special and "holds the key to his life". He is falling for Yeon-joo.Han Hyo-joo as Oh Yeon-joo
Park Min-ha as child Yeon-joo
Hyun Seung-min as young Yeon-joo
A 30-year-old woman, she is Thoracic Surgery's 2nd year resident doctor of Myung Se Hospital. She is the daughter of a famous comic author who made comic series "W". Yeon-joo gets sucked into the webtoon by Kang Cheol and saves Cheol a number of times due to ability to switch back and forth between the real world and the webtoon. She is falling for Kang Cheol.People around Kang Cheol
Jung Yoo-jin as Yoon So-hee
A 30-year-old woman, she is Kang Cheol's secretary and friend. She has a crush on Kang Cheol and is jealous of Yeon-jooLee Tae-hwan as Seo Do-yoon
A 31-year-old man, he is Kang Cheol's bodyguard and a martial arts instructor.Park Won-sang as Han Cheol-ho
A 55-year-old man, he is an inspector and a member of Congress, New Democratic Party presidential prospect. He is the prosecutor of Kang Cheol and firmly believes that Kang Cheol is the one who killed his family. Han Cheol-ho looks for many opportunities to imprison Kang Cheol. He goes to the point of working with the real killer in the webtoon to imprison Kang CheolCha Kwang-soo (ko) as Son Hyun-seok
A 58-year-old man, he is the director of a program specializing in criminal investigation and the general manager of the current channel W.
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W - Two Worlds
Mystery / ThrillerW (Hangul: 더블유; RR: Deobeuryu) is a 2016 South Korean television series, starring Lee Jong-suk and Han Hyo-joo. It airs on Wednesdays and Thursdays at 22:00 (KST) on MBC starting July 20, 2016. The drama is Han Hyo-joo's small screen comeback after...