TCM’s two-day salute to Technicolor, on its 100th birthday, continues all day today and tonight – and to me, it’s crowned by a showing of this 1959 Alfred Hitchcock thriller, a masterpiece of images, plotting, pacing and acting. Cary Grant plays a Madison Avenue advertising executive forced to run for his life across the country, in the same general direction, after being mistaken for a secret agent and pursued by foreign spies. It’s fun to imagine Jon Hamm, as Don Draper