ONE, TWO, THREE. Billy Wilder's frenetic and family-friendly film One, Two, Three (1960) starts a week-long run today at the Film Forum. The Cold War/Coca-Cola comedy is rightly hailed as a tour-de-force for its star, James Cagney. Based on a play by Ferenc Molnár, the movie (which in some respects anticipated The Producers) sometimes bogs down in staginess and its outdated premise, but it's still worth viewing.