When I was doing the quest at vault 22 with keely, as I was blowing up the pipe Raul was knocked unconscious and ED-E dissapeared. I looked all over the vault and when I couldnt find him I went into the northern passage to send him back to primm and when I get to primm he's not there...anyway to find my best friend in fallout?

He exploded. He vanished, but the game still treats it like he's there. This is fixed in the upcoming patch.