THE DOCTOR: Well, what’s the use of a good quotation if you can’t change it?

Doctor Who (1963-1989) British science fiction television series, original run (BBC)

22×07 “The Two Doctors,” Part 1 (1985-02-16) [w. Robert Holmes]
    (Source)

(Source (Video)). Given after Peri notes a quotation the Doctor just attributed to Rassilon was actually Samuel Johnson. This line is from the Sixth Doctor (the Second Doctor being the other Doctor in the episode).