Dr. First

According to Little Miss Dee, Dr. First was a part of the "Doctor Who Roger Hargreaves books". Its cover featured the First Doctor in the Mr. Men art style. (NOTVALID: Doctor Who meets Mr. Men)

Important note
This is an in-universe counterpart of the real world Dr. Men series prose story Dr. First. However, due to Doctor Who meets Mr. Men being an episode of The Fan Show, it is not considered a valid source by this wiki.