A teenage boy named Mark fell into
the hat of Merlo the Magician and arrived in Lidsville, a land
of living hats. The hats are depicted as having the same
characteristics as the humans who would normally wear them. The
characters' houses were also hat-shaped.
Butch Patrick, Charles Nelson
Reilly, Billie Hayes, Jerry Maren, Sharon Baird, Joy Campbell,
Van Snowden, Lennie Weinrib, Joan Gerber, Walker Edmiston