To Watch Tonight

What to watch after being groped by a mythical creature ... • College basketball: NCAA tournament, regional semifinals: East regional, at Charlotte, Washington State vs. North Carolina and Tennessee vs. Louisville; West regional, at Phoenix, West Virginia vs. Xavier and UCLA vs. Western Kentucky (7 p.m., ET). Time to revisit the smoking ruins that are your brackets. [ CBS] • Golf: LPGA, Safeway International, first round, at Superstition Mountain, Ariz. (6:30 p.m., ET). I have a bad feeling about this, but I can't quite pinpoint what it is. [ The Golf Channel] • NBA: Dallas at Denver (8:15 p.m., ET); Portland at Golden State (10:30 p.m., ET). Playoff bus is leaving, folks. Get on board or stay home. [ TNT]