7/21/2004 1100 AM All Times ET/PT
Comedy Central Presents John Heffron (ep#806)
7/26/2004 1030 AM All Times ET/PT
Kathleen Madigan
In case you're interested in catching more of their acts. Both are half hour shows. Kathleen and Todd Glass also have shows on Comedy Central Presents but they're not currently scheduled.
According to Zap2it, Alonzo will be on Comedy Central's Premium Blend on 7/26 at 11 am as one of several acts.