I was called in to teach an actor and a key background player several lines in a foreign language for an upcoming episode of CBS' Criminal Minds (I don't want to give away the plot by naming the language). The production had the lines translated into the foreign language, then I recorded a native speaker reciting the lines, which I then taught to the actor by phone. I went to their set the following day to coach the actor, as well as teaching the lines to a background player.