Tuesday's Highlights: Nova goes into orbit
SPACED OUT: On 'Nova,' the new episode 'Hubble's Amazing Rescue' documents the recent shuttle mission to service the Hubble Space Telescope (8 p.m. KCET).
Explorer: The new episode "Secret History of Gold" probes the dark underbelly of the gold trade with a treasure hunter and an illegal miner (7 and 10 p.m. National Geographic).
The Biggest Loser: A challenge winner gets to divide the contestants into two teams, each of which will train with either Jillian Michaels or Bob Harper, in this new episode (8 p.m. NBC).
90210: Silver and Kelly (Jessica Stroup, Jennie Garth) deal with shocking news about their mother (Ann Gillespie) (8 p.m. KTLA).
Shark Tank: A veterinarian claims a product will prevent cancer in pets (8 p.m. ABC).
Hell's Kitchen: International culinary experts serve as guest judges when the three finalists create dishes from various parts of the world. Then the final two chefs do battle in the final challenge and dinner service before chef Ramsay chooses the winner (8 p.m. Fox).
NCIS: Los Angeles: An Iraqi businessman is murdered and the team searches for the former Marine who was hired to protect him (9 p.m. CBS).
Melrose Place: A famous fashion designer (Kevin Alejandro) wants Riley (Jessica Lucas) to be the face of his new jeans campaign and Lauren (Stephanie Jacobsen) takes a job on a yacht (9 p.m. KTLA).
Frontline: The new episode "Obama's War" documents the U.S. counterinsurgency strategy used in Afghanistan and Pakistan (9 p.m. KCET).
Independent Lens: The documentary series kicks off a new season with "Herb and Dorothy," a profile of Herb and Dorothy Vogel, a postal clerk and a librarian who built one of the most important contemporary art collections in history, proving that you "don't have to be a Rockefeller" to collect art (10 p.m. KCET).
Bizarre Dinosaurs: The life, combat and death of strange beasts that roamed the planet 100 million years ago provide insight on evolution as world-renowned paleontologists comb the globe in search of lesser-known and surprising members of the dinosaur family (5 and 8 p.m. NGC).
Cast Confessions: The Facts of Life: Footage and interviews with cast members, writers and network executives reveal backstage secrets and hidden drama behind the TV series "The Facts of Life" (7 and 11 p.m. Biography).
Dan in Real Life: Widower and single father Dan (Steve Carell) falls for a woman (Juliette Binoche) he soon learns is dating his brother (Dane Cook) in this 2007 comedy (6:40 p.m. Starz).
Wyatt Earp: Kevin Costner is reunited with director Lawrence Kasdan ("Silverado") for this 1994 epic. Gene Hackman, Dennis Quaid, Mark Harmon, JoBeth Williams, Mare Winningham and Bill Pullman star (8 p.m. AMC).
Soccer: FIFA U-20 World Cup: Semifinals (7:15 a.m.; 10:45 a.m. ESPN2).
College football: Arkansas State at Louisiana-Monroe (5 p.m. ESPN2).