Please to enjoy the crossover of our time travelers, the disembodied head of Doc and Professor Whom. https://youtu.be/ocVfwyrokDQ
Doc learns more about the origins of his disembodied skull in a jar from the future. https://youtu.be/1VGwn6gdRwM
Doc chats with his own disembodied skull from the future in the Dorothy Fontana Break Room https://youtu.be/uf9h4wA6vjk