Hart Hanson has tweeted about The Gravedigger returning TWICE now. Plus, David Boreanaz alluded to it in a Season 4 interview. Click on the "Gravedigger" label to read that other tweet.
@HartHanson Hi Hart, I would love to see a gravedigger ep this season! maybe with both Brennan and Booth kidnapped! that would be awsome!
Don't worry @GSDfan the Gravedigger will return!
![Bones Spoilers](http://1.bp.blogspot.com/--j3iHTrfN2U/TwhfedlN6hI/AAAAAAAAAEk/Qxqi4GwGmyo/s1600/spoilers.jpg)