An eccentric millionaire and his grandchildren are embroiled in the plights of some forest gnomes who are searching for the rest of their tribe. While helping them, the millionaire is suspected of being crazy because he's seeing gnomes! He's committed, and the niece and nephew and the gnomes have to find him and free him.
Walter Brennan
as D.J. Mulrooney / Knobby
Matthew Garber
as Rodney
Karen Dotrice
as Elizabeth
Richard Deacon
as Ralph Yarby
Sean McClory
as Horatio Quaxton
Ed Wynn
as Rufus
Jerome Cowan
as Dr. Ramsey
Charles Lane
as Dr. Scoggins
Gil Lamb
as Gas Attendant
Maudie Prickett
as Katie Barrett
Cami Sebring
as Violet
Tom Lowell
as Jasper