Bob the Builder (1999)

S3E12 Muck's Sleep-Over

Bob and the machines are busy working on a tunnel overnight. Muck, who is spending the night at the farm with Travis, becomes frightened by the dark and the eerie sounds made by Spud. In a panic, he bolts and goes missing. At the same time, Pilchard hears an owl hooting and decides to investigate, only to vanish as well. Meanwhile, Spud finds himself lost in the woods, adding to the growing concern.