Quote from Brett Partridge at S06E01. - ''Who did this to you?''
Quote from Patrick Jane at S06E05. - ''Who did this to you?''

Just sounds interesting, they said this with same tone etc.

Another interesting thing is

Reede Smith was shot Robert ''Bob'' Kirkland 7 times at S06E04.
Wayne Rigsby said ''He was shot six times in the back.'' 
Kimball Cho said ''Six doesn't sound so reluctant.''
Wayne Rigsby said ''No, it doesn't.'' at S06E05.

Also Robert ''Bob'' kirkland said ''...real straight shooter.''  about Reede Smith at S06E04.

Maybe it's reference about previous episodes and the list, you know, like '' Six isn't right, because Brett Partridge isn't dead...''.