Weird thought...

Is there an equivalent of a Bacon number for Doctor Who? e.g, Actor X was never in any version of Doctor Who, but he was in a film with Actor Y, who was in a film with Actor Z who played a Companion, so X has a Doctor Who number of 2. You get the idea, I'm sure.

It occurs to me that with last night's episode most of Hollywood probably now has a Doctor Who number of 2 or 3, if not less... Sigeurney Weaver, for example, now has a Doctor Who number of 1.

Comments may be spoilery.