Greater Boston 6 p.m. WGBH (Channel 2)
Race 2012 8 p.m. WGBH (Channel 2) The changing racial makeup of America is viewed through the prism of the 2012 presidential election.
PBS NewsHour: Debates 2012 9 p.m. WGBH (Channel 2) From Hofstra University, President Obama and Mitt Romney take part in a town-hall meeting.
Sandwiches 7:30 p.m. WCVB-TV (Channel 5) An Atomic Meatloaf Meltdown, a spicy pork and cilantro torta, a good old cheesesteak, and vegan and gluten-free alternatives.
Boston Public Radio noon WGBH-FM (89.7) “30 Issues in 30 Days” election series continues with a focus on energy and town utilities.
Radio Boston 3 p.m. WBUR-FM (90.9)
NightSide With Dan Rea
8 p.m. WBZ-AM (1030) Listeners react to presidential debate number two.
NEWS & TALK SHOWS
CBS This Morning at 7 a.m. on Chs. 4 and 12.
Good Morning America at
7 a.m. on Chs. 5, 6, and 9.
Today at 7 a.m. on Chs. 7 and 10; 10 a.m. on Ch. 7. Martha Stewart.
Live! With Kelly and Michael at 9 a.m. on Chs. 5 and 9;
10 a.m. on Ch. 10.
Rachael Ray at 9 a.m. on
Ch. 4; 2 p.m. on Ch. 10.
Steve Harvey at 9 a.m. on
Ch. 64; 10 a.m. on Chs. 5 and 9.
The Jeff Probst Show at 10 a.m. on Ch. 38; 3 p.m. on Ch. 6.
The View at 11 a.m. on Chs. 5, 6, and 9. Hayden Panettiere.
The Doctors at 2 p.m. on
Ch. 7; 4 p.m. on Ch. 64.
The Talk at 2 p.m. on Chs. 4 and 12.
Anderson Live at 3 p.m. on Chs. 12 and 25.
Katie at 3 p.m. on Chs. 5 and 9; 4 p.m. on Ch. 6.
The Ricki Lake Show at 3 p.m. on Ch. 64; 4 p.m. on Ch. 25.
The Ellen DeGeneres Show at 4 p.m. on Chs. 5, 9, and 10. Emma Watson discusses “The Perks of Being a Wallflower’’; D.L. Hughley.
Real Time With Bill Maher at 10 p.m. on HBO2. Former FDIC chairwoman Sheila Bair and commentator Ann Coulter.
Charlie Rose at 11 p.m. on Chs. 2 and 11.
The Daily Show With Jon Stewart at 11 p.m. and 1 a.m. on COM.
Colbert Report at 11:31 p.m. and 1:30 a.m. on COM.
The Tonight Show With Jay Leno at 11:34 p.m. on Chs. 7 and 10.
Late Show With David Letterman at 11:35 p.m. on Chs. 4 and 12. Steve Martin. Gotye performs.
Nightline at 11:35 p.m. on
Chs. 5, 6, and 9.
Conan at midnight and 2 a.m. on TBS. Kate Walsh; Steven Yeun. Ty Segall performs.
Jimmy Kimmel Live at midnight on Chs. 5, 6, and 9.
Tavis Smiley at midnight on Ch. 44; 12:30 a.m. on Chs. 2 and 11.
Late Night With Jimmy Fallon at 12:36 a.m. on Chs. 7 and 10.
The Late Late Show With Craig Ferguson at 12:37 a.m. on Chs. 4 and 12. Lauren Graham; author James Patterson. Michael Kiwanuka performs.
Last Call With Carson Daly at 1:36 a.m. on Chs. 7 and 10.
Fox and Friends First at 5 a.m. on FNC.
Fox and Friends at 6 a.m. on FNC.
Broken Flowers 6:15 p.m. (SHO2) An aging Casanova (Bill Murray) seeks out his former lovers. R (2005)
Harry Potter and the Goblet of Fire 7:30 p.m. (FAM) The fourth installment involves a plot to trap Harry. Daniel Radcliffe. PG-13 (2005)
The Social Network 7:30 p.m. (FX) Mark Zuckerberg (Jesse Eisenberg) creates the website Facebook, but soon faces lawsuits. PG-13 (2010)
The Crossing Guard 8 p.m. (FLIX) A jeweler seeks revenge on the man convicted of killing his daughter. Jack Nicholson. R (1995)
The Descendants 8 p.m. (HBO) A middle-aged man (George Clooney) discovers that his comatose wife was having an affair. R (2011)
Eyes in the Night 8 p.m. (TCM) A blind detective becomes embroiled with Nazis. Edward Arnold. NR (1942)
Traffic 8 p.m. (TMC) Drama about drug trafficking. Michael Douglas. R (2000)
An American Haunting 9 p.m. (SUND) A family in 19th-century Tennessee is haunted by an evil spirit. Donald Sutherland. PG-13 (2006)
The Hunted 10 p.m. (FLIX)
A tracker (Tommy Lee Jones) hunts down a murderer in Oregon’s woods. Benicio Del Toro. R (2003)