Programs Showing in HD Today

Valentino: The Last Emperor

SHOW 8:00 pm ET

No, not Rudolph. The Valentino at the center of this 2008 documentary is fashion designer Valentino Garavani -- better known by his first name and his reputation as the creator of gorgeous dresses for some of the world's most gorgeous women, including Jacqueline Kennedy Onassis. The film crew follows Valentino at work and at home as he prepares for a 45th anniversary celebration of his work.

90210

Jessica Lowndes stars in "90210" Tuesday on The CW.

CW 8:00 pm ET

Silver (Jessica Stroup) recalls her childhood parties when Jackie and Teddy (guest stars Ann Gillespie and Trevor Donovan) surprise her with a "half-birthday" celebration. Navid (Michael Steger) confronts Jasper (guest star Zach Sherman) after seeing him sell drugs to Adrianna (Jessica Lowndes). Debbie and Harry (Lori Loughlin, Rob Estes) are forced to tell Dixon (Tristan Wilds) that Sasha lied about being pregnant in "A Trip to the Moon."

Nova: Extreme Cave Diving

PBS 8:00 pm ET

In this episode, Dr. Kenny Broad dives into underwater caves that formed during the last ice age. These caves are Earth's least explored and perhaps most dangerous frontiers, and may offer clues to the hidden history of our planet's climate.

American Idol

FOX 8:00 pm ET

The singers who made it past the audition rounds go on to Hollywood to narrow the competition down to the semifinalists.

Melrose Place

CW 9:00 pm ET

The police search for Auggie (Colin Egglesfield) after discovering his blood was on the murder weapon. An incident at work forces Jonah (Michael Rady) to pretend he is engaged to Ella (Katie Cassidy), who really gets into her role. David (Shaun Sipos) arranges a secret play date with his little brother (guest star Cameron Castaneda). Ashlee Simpson-Wentz also stars in "Ocean."

Past Life

FOX 9:00 pm ET

At the Talmadge Center for Behavioral Health in New York, the focus is on the science of the soul. Dr. Kate McGinn, a firm believer in reincarnation, tries to help present-day clients whose troubles, she believes, are caused by past-life traumas. Her partner, a pragmatic former NYPD homicide detective still grieving the accidental death of his wife, believes Kate is operating on the fringes of science. His solid detective skills mesh with Kate's out-of-the-box thinking, leading them to unravel the mysteries in the past lives of their clients. In this special premiere, McGinn and Whatley try to help a teenager suffering from regression episodes in which he remembers being kidnapped and killed in a past life.

Independent Lens

Young rapper P-Star is profiled on "Independent Lens" Tuesday on PBS (check local listings).

PBS 10:00 pm ET

Child stars don't have it easy, as anyone who reads the tabloids can tell you. So can Priscilla, who at 9 is pursuing her dream of being a rap star. She and her single dad and mentor, Jesse, are starting to reap the rewards of her ambition and talent -- moving to a four-bedroom apartment and playing at sold-out clubs. But she's starting to realize that staying a little girl is going to take some effort in the new documentary "P-Star Rising."

The Millionaire Matchmaker

BRAVO 10:00 pm ET

Patti tries to help Smike Wallen, a smart and sensitive gay man whose traveling has prevented his setting down roots, including any kind of meaningful long-term relationship, as well as high-maintenance client Rupert Wainwright, a 48-year-old director and Rhodes Scholar from England who insists that any romantic prospects be under 30 years old.

Explorer: Python Wars

NGC 10:00 pm ET

You may find yourself involuntarily lifting your feet from the floor while watching "Python Wars," an unsettling new episode that chronicles how Burmese pythons -- some of the largest and most powerful snakes in the world -- are poised to spread throughout the U.S. from their current home in Florida's Everglades. Scientists plot a counteroffensive designed to avoid upsetting the ecological balance in the Everglades.

The Good Wife

CBS 10:00 pm ET

As Alicia (Julianna Margulies) defends a husband accused of murdering a baby sitter, she and her family prepare for the outcome of Peter's (Chris Noth) appeal and his potential homecoming in the new episode "Hi." Christine Baranski, Josh Charles, Archie Panjabi and Matt Czuchry also star; James McDaniel ("NYPD Blue") guest stars.