Harold and the Landslide is the fourth story in the 1989 Annual.
Heavy rains cause a landslide on Duck's Branch Line. Meanwhile, Harold is called to rescue a hiker who has fallen over a cliff by the raging sea. The rescue mission becomes tricky with strong winds blowing in, but at last, the hiker is taken safely to Wellsworth Hospital. Back at Arlesdale (Arlesburgh West), Duck is not pleased as he is not allowed on his branch for a week while the line is repaired.