James was originally given the run, but was replaced by Emily when she was late with the flour train once too often. At first, the engines were worried about the route, as it was rumoured that the loch was occupied by a monster and that boulders would bash engines' buffers. When Emily took the Black Loch run, however, she learned that the monster was actually a family of seals, so the engines now enjoy taking this route. Once, Donald and Douglas got trapped here, but were soon rescued by Harvey (who they at first mistook for the monster).
- The Black Loch monster is based on the legendary Loch Ness monster (alternatively known as ‘Nessie’).