Original: The Hunt for Red October , Patriot Games , Clear and Present Danger , and The Sum of All Fears have been turned into commercially successful films with actors Alec Baldwin , Ben Affleck , and Harrison Ford as Clancy 's most famous fictional character Jack Ryan , while his second most famous character John Clark has been played by actors Willem Dafoe and Liev Schreiber .
Simplified: From the books The Hunt for Red October , Patriot Games , Clear and Present Danger , and The Sum of All Fears films were made , that many people wanted to see .