Tuesday, February 9th

Please confirm air times with your local times.

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.

Ninotchka

TCM 8:00 pm ET

East meets West in this 1939 comedic tale of culture shock. Three Soviet emissaries are sent to Paris to sell the family jewels of the exiled Grand Duchess Swana (Ina Claire), but all does not go as planned. The three start to see the value of a capitalistic society, prompting by-the-books comrade Nina Yakushova (Greta Garbo) -- otherwise known as Ninotchka -- to take over the mission. Garbo's next-to-last film was acclaimed as one of her best.

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.

The Biggest Loser

NBC 8:00 pm ET

The contestants head to Colorado to train at an Olympic training facility, where they are welcomed by paralympic athlete Allison Jones and learn the game is going from teams to singles. Olympic skiers Julia Mancuso and Jeret "Speedy" Peterson help train the contestants. After a biathlon challenge, two more players are sent home. Skaters J.R. Celski and Rockne Brubaker also appear.

90210

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."

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.

Stalag 17

TCM 10:00 pm ET

The unofficial inspiration for television's "Hogan's Heroes," director Billy Wilder's 1953 comedy-drama remains one of the screen's most memorable war stories. William Holden earned an Oscar as a POW who can bargain with his German captors -- but his wits take him only so far when he's suspected of overt action against the enemy. Filmmaker Otto Preminger proves to be a great actor as the commandant. Don Taylor and Peter Graves co-star.

Independent Lens

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.