I believe that this hat is a reference to the Doctor Who episode "Silence in the Library" where the Vashta Nerada kill one of the crew and leaves his skeleton inside his body.
Photo from the episode: 
Pugs501 (talk) 10:47, 3 November 2013 (PST)
- It's not. The item creators have confirmed this multiple times. --Omolong (talk) 10:48, 3 November 2013 (PST)
