Not a theory, this is just for fun.

I VODed Elementary, during the breaks, there were extended Mentalist S6 promos in which they showed a brighter shot of the 'Tyger, tyger' scene in "Red sky in the morning.'  I recognized the mask - it's a transparent old female one that you can get under $10..

We got a profile view, this is what Jane would have seen of RJ: 

http://img10.imageshack.us/img10/6245/49ax.jpg

(P.S. I used Malcolm McDowell's eyes.)