The Day of the Dolphin (1973)

Synopsis
Director Mike Nichols and screenwriter Buck Henry team up again (after collaborating on The Graduate and Catch-22) for this adaptation of Robert Merle's best-selling adventure novel concerning dolphins who become pawns in a plot to kill the president. George C. Scott plays Dr. Jake Terrell, a researcher who, along with his wife Maggie (Trish Van Devere), is investigating dolphin intelligence, believing they have the capability of speech. Harold DeMilo (Fritz Weaver), in charge of a major corporation, sponsors their work. But undercover work by government agent Curtis Mahoney (Paul Sorvino) reveals that DeMilo is working with a right-wing group planning to kidnap the dolphins and use them to blow up the presidential yacht. Jake and Maggie have to race against time to save both their dolphins and the president. ~ Paul Brenner, All Movie Guide