The BBC News was reporting on the Roger Clemens perjury trial last week . . . before the judge declared a mistrial.  And they had on the baseball editor for the Associated Press, Ben Walker.
--But after a detailed introduction noting Walker's 23-year history covering Clemens, it turned out they had the wrong guest. (The guest has a great line for the host at about :28...right after he's asked a question about Clemens.)