"Two Days In October" (9 p.m., PBS)

"Two Days In October" (9 p.m., PBS): This is the latest installment of the American Experience documentary series. It looks back on two harrowing 1967 events: an ambush on a U.S. battalion in Vietnam that killed 61 soldiers and a student protest at the University of Wisconsin that erupted in violence. With these events, "history turned a corner," the film maintains.
"Miss Seventeen" (10:30 p.m., MTV): MTV and Seventeen magazine are joining forces for this new reality series. The show will feature 17 (naturally) young women from all over the country living together under one roof and competing to establish themselves as the "ultimate role model." The winner receives a college scholarship and an appearance on the magazine's cover. Let the catfights begin.
"The Colbert Report" (11:30 p.m., Comedy Central): Chances are that fans of the hilarious "Daily Show with Jon Stewart" will get a kick out of this new spinoff anchored by know-it-all correspondent Steven Colbert. What the mock-happy "Daily Show" is to evening news, "The Colbert Report" aspires to be to personality-driven pundit programs. Colbert, he of the arched eyebrow, deadpan delivery and pompous smirk, will spoof the Bill O'Reillys and Anderson Coopers of the world as he tackles the important issues of the day, spouts general absurdities and informs his guests as to why their opinions are just plain wrong.
"Last Best Chance" (8 p.m., HBO): What if Al-Qaida terrorists obtained nuclear material? And what if they recruited bomb-making experts to turn that material into crude nuclear weapons? The Nuclear Threat Initiative, a nonprofit group, produced this fact-based film to address those questions. The one-hour movie offers Hollywood's take on what would happen if life turned into a real, live version of "24."