1 Oh Sung-moo Has Disappeared!63 min · 20 Jul 2016 2 Find Her, the Key to My Life63 min · 21 Jul 2016 3 I Am Someone Who Will Do That63 min · 27 Jul 2016 4 What Is This World Where You Live In?62 min · 28 Jul 2016 5 I've Come Here. To Your World.62 min · 3 Aug 2016 6 The End62 min · 4 Aug 2016 7 Chul and Yeon-joo Get Married60 min · 10 Aug 2016 8 The Killer Is After You60 min · 17 Aug 2016 9 Make It a Happy Ending61 min · 18 Aug 2016 10 The World Controlled by the Killer62 min · 24 Aug 2016 11 What Happens Next?61 min · 25 Aug 2016 12 Chul's Second Awakening61 min · 31 Aug 2016 13 For the Last Episode of W60 min · 1 Sep 2016 14 Secret of the Tablet59 min · 7 Sep 2016 15 Which Kind of Ending Will It Be?59 min · 8 Sep 2016 16 After W Ends59 min · 14 Sep 2016