The second day of all-out, all-day March Madness begins just after noon ET on CBS, and continues throughout the day, hopping among various networks. CBS starts with the first tip-off, Cincinnati vs. Iowa, followed at 12:40 p.m. ET by truTV (Ole Miss vs. Oklahoma), 1:30 p.m. ET by TNT (Texas Tech vs. Northern Kentucky), and at 2 p.m. ET by TBS (Kansas State vs. UC Irvine). And that’s just the first four games. Before the night is over, a dozen others follow.