Why did I focus a challenge on Diddler? Am I intelligent?

Music
Mind Bender
Tunnel Vision
Death From Below
Gladiator
I Think You Should Do As He Says
On A Knife Edge
The Art of War
It Was The Joker
I Know What You Guys Are Thinking
Wake The Dead
Blood of The Demon
Into The Cold
Bring Her Back To Me
Protocol 10
Current Affairs