Most TV producers, and most quality TV shows, are fleeing from broadcast to cable TV in droves. (Or, at least, mini-droves.) Opportunities are better there, restrictions are looser, and many of the programs are more ambitious. But Shawn Ryan, who helped lead that revolution with FX's The Shield, is going against the grain -- by moving to broadcast TV for his new cop series, The Chicago Code, which premieres tonight at 9 ET on Fox...