NCIS (7 p.m., Ch. 2): Ducky refuses to perform an autopsy on a Muslim Marine.

High school basketball (7 p.m., Ch. 14): Brighton at Alta

Reaper (7 p.m., Ch. 30): The CW repeats the pilot (and plans to continue airing repeats in this earlier time slot).

Presidential debate (7 p.m., MSNBC): Democrats meet in Las Vegas.

Comanche Moon (8 p.m., Ch. 2): Part 2 of this miniseries. (Concludes on Wednesday.)

One Tree Hill (8 p.m., Ch. 30): Kevin Federline guest stars as a musician. Do you think he can possibly be that good an actor?

College basketball (8 p.m., The mtn.): BYU at UNLV

Boston Legal (9 p.m., Ch. 4): Denny insists on handling a murder case on his own.

Law & Order: SVU (9 p.m., Ch. 5): Rhea Perlman ("Cheers") guest stars as a defense attorney representing a youngster charged in a brutal assault on a classmate.