If this is a reunion of the Doctor's wives, the artist left out Elizabeth I and Marilyn Monroe. And an (as yet) unnamed woman on Gallifrey (Susan's grandmother, eh?)

gridsleep said:

If this is a reunion of the Doctor's wives, the artist left out Elizabeth I and Marilyn Monroe. And an (as yet) unnamed woman on Gallifrey (Susan's grandmother, eh?)

Actually, it looks like a summation of all the main characters that popped up in Series Six.