"How I Met Your Mother"
After he sees a powerful documentary about garbage, Marshall becomes obsessed with saving the environment. Robin makes Barney admit he has feelings for a woman (guest star Nazanin Boniadi). 7 p.m. on CBS and KWCH, Channel 12.
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"World's Deadliest Towns"
This three-part miniseries hosted by Dave Salmoni takes visitors to a trio of locales in India and Africa where animals and people are chronic adversaries. The opening episode, "Killer Elephants," is set in West Bengal, India, where the elephants' behavior belies their reputation as "gentle giants." 7 p.m., Animal Planet, Channel 56.
"Outrageous Kid Parties"
This new four-episode series focuses on wildly doting families who spend a small fortune staging a virtual circus just to make sure their child has the party of his lifetime, even if the child is just 6 years old. 8:30 p.m., TLC, Channel 43.
Appearing at a school's career day, House breaks some rules by sharing explicit medical stories, so he's summoned to the principal's office. 7 p.m., Fox and KSAS, Channel 4/24.
Emily interferes with Annie's love life and her internship at the playhouse. Naomi hides her feelings for Max. Ivy makes a new friend (guest star Manish Dayal). 7 p.m., CW and KSCW, Channel 5/33.
The Cape, Rollo and Max must rely on Dana's legal connections to help them find The Lich, while Orwell struggles to fight the effects of Conrad Chandler's potent serum as she drifts into fantasy sequences that reveal more about her past. 8 p.m., NBC and KSNW, Channel 3.
While investigating the apparent robbery-homicide of a New York cabbie, Beckett and Castle discover the victim was involved in a mysterious conspiracy. 9 p.m. on ABC and KAKE, Channel 10.
"Amanda Knox: Murder on Trial"
College exchange student Amanda Knox stands trial in Italy, where she is accused of murdering her roommate, Meredith Kercher, during a semester abroad. 8 p.m., Lifetime, Channel 38.
Iowans take their son, daughter, prize boar and mincemeat to the state fair. 7 p.m., TCM, Channel 54.
Syracuse at Villanova, 7 p.m., ESPN, Channel 32
Oklahoma State at Kansas, 8 p.m., ESPN, Channel 32