aww I'm not really that big of a doctor who fan but this is really cool. the person who wrote the comment should be an author for a book that'd be so cool<<not in the fandom, got friends that are tho, and this made my heart break
Captain Jack has an American accent. They are British because the TARDIS translates the language into what the companion/viewers understand. When translating to English, the default accent is British, for some reason.