Jaw is widely held to be a classic film, and an early example of the summer blockbuster. With that music, and the three excellent lead performances. But as with Rocky, and the awful Police Academy films, to stretch the original idea to three further sequels, really was going too far. Roy Scheider, had wisely bailed out by this point. Instead we see the family, of his late character,Brody,being terrorised by a relation of, believe it or not, the original shark. Who said fish only have three second memories. The lack of credibility in this storyline, makes this film a no, no. Michael Caine, has often been asked why he sacrificed his artistic integrity to appear in such a clanger of a film, in his biography he answers the question, it was too buy himself a large house. At least he did not say that he thought the script was the best he had ever read.