Episode Title:A Friend in Need.Episode Description:Jack joins Miss Jenny's crew in excavating the land under an old railway bridge, but Ned the steam shovel is too clumsy to lower his arm enough while passing under the bridge, and by accident, he knocks the important keystones loose. Quickly, Jack holds the bridge up as much as he can, but eventually is unable to hold it any longer, and the entire bridge collapses. However, Miss Jenny is pleased with Jack for his bravery and finally makes him an official member of the pack.