Cahill, United States Marshal, Lawman J.D. Cahill can stand alone against a bad-guy army. But as a widower father, he's on insecure footing raising two sons. Particularly when he suspects his boys are involved in a bank robbery, and two killings. Rio bravo : On one side is an army of gunmen dead-set on springing a murderous cohort from jail. On the other is Sheriff John T. Chance and his two deputies: one a recovering drunkard, the other a crippled...