Ghost Whisperer (7 p.m., Ch. 2): A blogger threatens to reveal Melinda's secret.

College volleyball (7 p.m., Ch. 11): Southern California at BYU

Canterbury's Law (8 p.m., Ch. 13): Elizabeth's associates try to keep her out of jail.

Battlestar Galactica (8 and 10:30 p.m., Sci Fi): Issues of faith and loyalty divide humans from humans, Cylons from Cylons.

Numb3rs (9 p.m., Ch. 2): Three witnesses in a murder case are themselves murdered.