Well Bones fans, it looks like we won't be meeting Booth's dad anytime soon. The good spoiler news is that the when Booth's Grandpa~guest star Ralph Waite returns fans are in for a powerful performance.
The flashback sequence was scrapped. “It wasn’t needed,” explains exec producer Stephen Nathan of the sequence, which was slated for this season’s Booth-centric fourth episode (which features the return of Ralph Waite as his Grandpa). “David’s performance was powerful enough [on its own]. It’s a very dramatic episode for him, and he more than rises to the occasion.”
Source: TV Line