Today, the Bones crew finished the 100th episode (5x16), directed by David Boreanaz, and they threw a little party. Cue the cake with bones and "100," and a slew of photos and tweets ensued. Spoiler
This ep contains a flashback, pre-episode 1x01, and you can tell from David B's hair:
A few more pictures from the party:
(All photos obtained via
biba79 , except the last one which is from
Marisa Roffman)
In the end, there were only a few bones left of the cake... (courtesy of
mosh426).