HOPSCOTCH opens. Directed by Ronald Neame. Written by Bryan Forbes and Brian Garfield. Breezy, continent-hopping, cloak & dagger gambol with a loveably rumpled Walter Matthau as a disgruntled ex-CIA agent who is forced to go on the run after announcing his intention to write a tell-all expose. Glenda Jackson aids & abets long with Sam Waterston, Herbert Lom and Ned Beatttty.