RENEE MONTAGNE, HOST:
And our last word in business this morning is: litigious days.
(SOUNDBITE OF "HAPPY DAYS" THEME SONG)
MONTAGNE: That, of course, is the theme from "Happy Days," the hit sitcom from the 1970s and '80s. These days, not everyone is so happy. Several cast members from the show are battling with CBS and Paramount, for unpaid royalties.