Booth had made her promise even though she didn't believe in them.  Driven by a desire to not let down her partner and powered by emotions she's struggling to control, Brennan follows through...but what has he left for her that she never suspected?

Season 3 post ep set at the end of Wanna Be in the Weeds and headed into A Pain in the Heart when it skews to a life all it's own.

*many thanks to Marwa for the fantastic banner!