Drama where you have to guess?

Recently watched Q Series: Close Your Eyes Before It's Dark. One of them was the murderer and we had to guess. I'm looking for a similar drama where one of the main characters is the killer. Can you recommend me some please?

Dramas where you have to guess who the killer is (may or may not involve the main characters):

• 365: Repeat the Year 
• Boku Dake ga Inai Machi 
• Train 
• BORDER 
• Memorist
• Some day or One day
• Masquerade Hotel 
• White Christmas (saw this recommended on the drama you were talking about. I haven't seen it though)

Similar - Guess who the ultimate bad guy is:

• Stranger 
• Hyena