The poker shows regularly running new episodes are:
Poker After Dark, 2:05 AM Tuesday through Saturday (late night Monday through Friday) and 1 AM Sunday (late night Saturday), NBC. Some NBC affiliates aren't airing it but you can watch it on the web. NBC's Poker After Dark schedule shows which weeks are new and reruns.
World Poker Tour, 9 PM Wednesday, Travel Channel. They rerun new episodes at midnight Wednesday and noon Saturday.
Aussie Millions, 11 PM Saturday, Fox Sports. They rerun it at 5 PM on Wednesdays.
National Heads-Up Poker Championship, noon Sunday (3 PM Pacific), NBC. You can see the full schedule or watch the show on NBC's web site.
The poker shows below air on local channels. Check an online programming guide or their web sites for the time/channel in your area.
Heartland Poker Tour
Ultimate Poker Challenge