Presidential debate (9 p.m., all major networks and cable news outlets): It’s Round 3 for

Presidential debate (9 p.m., all major networks and cable news outlets): It’s Round 3 for Obama and McCain as the presidential hopefuls engage in their final debate. The 90-minute showdown will be moderated by CBS newsman Bob Schieffer.

“Chocolate News” (10:30 p.m., Comedy Central): David Alan Grier returns to sketch TV in this topical series.