IDAHO (PT)

4:30 pm 

Arthur  "The World Record/The Cave"  "The World Record"--Why is Buster walking backwards, and Muffy not talking? They're trying to set world records of course! Everyone tries to go it alone, but Arthur and the gang discover that working together more readily creates success, fun -- and the world's largest pizza! "The Cave"--Stalactites and stalagmites and bats, oh my! Arthur thinks his class trip to the Clark Caves will be really cool. But won't it be, um, dark in there?. D

5:00 pm 

The Electric Company  "Revenge of the Zeros"  Upset about their score of zero points in the banana sculpture contest, Danny and Annie decide to ruin Paul the Gorilla's banana festival party that is being held at The Electric Diner. The Electric Company catches on, and does everything they can to stop the pranksters and save the party and preserve Paul's sanity. D

5:30 pm 

Nightly Business Report   Office Depot and Office Max could be the next big Wall Street merger. NBR's Suzanne Pratt takes a look at what this year's surge in mergers could mean for the markets. Dell posts better than expected results but profits slide in its latest quarter. D

5:56 pm 

Newshour Promo   NULL

6:00 pm 

PBS NewsHour   Senior Correspondent Jeffrey Brown reports on the ongoing debate about the connections-or lack of connections-between violent video games and violent behavior. D

7:00 pm 

Chatsworth House   The Duchess presides over the Chatsworth International Horse Trials, 75 fences over a 300-acre course, which in 2011 is an official qualifier for the London Olympics. Then the third annual Chatsworth flower festival, "Florabundance," is complicated by unseasonably warm spring weather and attacks on the plants by the estate's pheasants, rabbits and mice. Both these events provide income to help support the upkeep of the house.G

8:00 pm 

Billy The Kid: American Experience   Peeling back the layers of myths surrounding Henry McCarty, alias Billy the Kid, this is a story of a child born to impoverished Irish immigrants, who leads a hardscrabble, itinerant life, coming of age in a lawless corner of New Mexico. An Irish immigrant ring controls all money-making endeavors, with the Mexican population frequently cheated out of property. McCarty is ensnared in a centuries-old Irish-English conflict on the plains of the Southwest.G

9:00 pm 

After Newtown: Guns In America   AFTER NEWTOWN: GUNS IN AMERICA is an unprecedented exploration of America's enduring relationship with firearMs. From the first European settlements in the New World to frontier justice; from 19th-century immigrant riots to gangland violence in the Roaring Twenties; from the Civil War to civil rights, guns have been at center of our national narrative. Americans have relied on guns to sustain communities, challenge authority and keep the peace. Efforts to curtail their distribution and ownership have triggered epic political battles. D

10:00 pm 

Frontline  "Raising Adam Lanza"  In the wake of the mass killings at Sandy Hook Elementary School, FRONTLINE investigates a young man and the town he changed forever. Adam Lanza left behind a trail of death and destruction, but little else. He left no known friends, no diary. D

11:00 pm 

Charlie Rose   NULL