Billy was the son of a WWII veteran whose life was saved by Leo Wyatt during the war. When Leo attended a reunion, the veteran recognized Leo, though Piper quickly stated that he was his grandson. The veteran then introduced Leo to his sons and Billy told Leo that he had been hearing stories about him since he was a boy.
Billy appeared in a total of 1 episode throughout the course of the series.
- Season 4
- Saving Private Leo