I tried to think of a more creative setting, but ultimately nothing seemed to suit better than being stuck in a boring car ride. Initially I was going to stick them in the prairies, just to be mean. But I've been on multi-hour drives through Alberta, and I am not sure the Doctor would be able to withstand such torture.

IT IS TRUE. ALL OF THEM. River's not very blonde, but she is clearly a figment of the imagination so she doesn't count. ...And Jabe was a tree, but as she's a tree I think she is exempt from hair requirements.

You raise a very interesting intellectual debate.