The Enchanted World of Brambly Hedge (1996)

During the harvest season, Lord Woodmouse and Primrose go picking blackberries, while Wilfred looks for adventure by trying to find a creature called The Weasel. Primrose and Wilfred get lost as they explore the wilderness, so all the other mice send out a search party. The search party finds Primrose and Wilfred, so they all return home.