Notice octagonal O in Bones?
The Eight and the octagon represent resurrection and rebirth
David Boreanaz played Angel - the Vamp gone good, that buffy the slayer fell in love with.
When he emerged from the yellow sub, he was faced with a ghost from his past. They used a clay statue just like this to blow a hole to escape. * sacrifice of the Goddess ?
Once into the light .. the ghost departed ( after long chats with david clearing him of guilt he had in aiding his death & to pass a msg on to his love one) seconds later, he was lifted off a ship (that was going to be blown up ) rescued by a helicopter
During the visit of the grave, Bones explains she doesn't believe in ghost, but according TPTB, there was no possible he could escape on his own. While David was delivering his msg, the ghost walked by Bones, she seen him and they share a few words.
I wish i could watch it again and grab some screen shots (&more time on this post) but David Boreanaz was so resonating Anubis last night - trapped by the "gravedigger". Emerging from his stargate to escorted his fallen comrade, through the belly/darkness of the ships hull out into the light.
In this, he fulfilled Anubis duties, by protecting the spirit & leading him to the afterlife.