<P> The series follows two half - brothers , Wirt and Greg ( voiced by Elijah Wood and Collin Dean respectively ) , who become lost in a strange forest called the Unknown . In order to find their way home , the two must travel across the seemingly supernatural forest with the occasional help of the wandering , mysterious and elderly Woodsman ( Christopher Lloyd ) and Beatrice ( Melanie Lynskey ) , an irritable bluebird who travels with the boys in order to find a woman called Adelaide , who can supposedly undo the curse on Beatrice and her family and show the half - brothers the way home . </P>
who plays the woodsman in over the garden wall
Christopher Lloyd