From the Des Moines Register site:
The Des Moines Register’s presidential debates — the last debates before the Iowa caucuses — are this week. Republican candidates debate on Wednesday, and Democratic candidates debate on Thursday.
Both debates will be broadcast live at 1 p.m on Iowa Public Television, and replayed on IPTV at 7 p.m. each evening. The debates will also air live on CNN, C-SPAN3, Fox News Channel, C-SPAN Radio and Fox News Radio.