Thomas and Friends Wooden Railway - Mighty Mac
Mighty Mac is the most unusual engine on the island of Sodor. In fact, he is two engines in one: he is Mighty at one end and Mac at the other. When Mighty and Mac work together, they are the strongest engine on the island. But when they pull this way and that, they only end up where they began. So for Mighty Mac, two engines are better than one - as long as they're both going the same way.