“Jack Ryan: Ghost War” (**1/2 out of four) was an overall well-done adaptation of Tom Clancy’s blockbuster spy series about the Jack Ryan (John Krasinski) who reunites with his former C.I.A. operatives (Wendell Pierce, Sienna Miller, and others) to take down a treacherous international enemy who seems to monitor and know their every move. A definite improvement over the last 2 Chris Pine/Ben Affleck adaptations, and features enough spy intrigue and action to be engaging, but lacks the serpentine complexity that defined the best Ryan adaptation “Clear And Present Danger.” Pierce stands out and gives the film a big boost as James Greer.