Everyday down in the quarry Work, work, work so hard Haul that load, careful don't hurry Everyone plays a part But deep inside the old tunnels Someone hides away Too scared to come out and see us And too scared to say his name. Come on, sing along! Blue Mountain Mystery Blue Mountain Mystery The secret in the hills! Come on, sing along! Blue Mountain Mystery Blue Mountain Mystery The secret in the hills! All the narrow gauge engines Decide to tell a friend About the little green engine From start, to very end So Thomas wants to be useful Give Luke a helping hand To find that old yellow engine Get the answer if he can. Come on, sing along! Blue Mountain Mystery Blue Mountain Mystery The secret in the hills! Come on, sing along! Blue Mountain Mystery Blue Mountain Mystery The secret in the hills! Come on, sing along! Blue Mountain Mystery Blue Mountain Mystery The secret in the hills! Come on, sing along! Blue Mountain Mystery Blue Mountain Mystery The secret in the hills! (Only in the BMM credits) Yeah! Whoa! Yeah! Woah!