George C. Scott stars as a scientist who has trained dolphins to speak and understand English. Naturally some bad guys find out and want to use the dolphins in an assassination attempt.
One of the many ecological "message" films of the 1970s. The plot is, technically, pretty silly but they pull it off. It has a great director (Mike Nichols) and Scott and Trish Van Devere are very good--but this just misses the mark. It's not a BAD movie just not a great one and I personally had some trouble taking it seriously. It was supposed to be a big hit and cost quite a bit to make. Unfortunately it was a HUGE bomb and disappeared quickly. That's too bad because it's actually pretty good. It's well done and the voices of the dolphins are (at first) frightening but you get used to them. Also it does have an ending which had me crying. I defy anyone to sit through that and not be moved.
So, despite the scientific improbabilities, a pretty good movie that deserves a wider recognition.