In the first episode without Richie and Ralph,the 1980-1981 season,Mother Kelp is unseen calling from upstairs.I wonder who supplied her voice??? Also it is the episode where Fonzie grows a beard and starts work at the school as an auto techician. I saw this episode today on WGN this morning.

I have no idea who's voice that was. It almost sounded like a man's voice.

I was thinking maybe that was Tom Bosley's voice and they tape recorded it,it sure sounds like him.