Kitchen Nightmares: In this new episode, Gordon Ramsay visits three California restaurants he helped turn around in the past: La Frite in Sherman Oaks, Kingston Cafe in Pasadena and Capri in Eagle Rock, along with the Spanish Pavilion in Harrison, N.J. Are they continuing to succeed, or have they reverted to their bad old ways? (8 p.m. Fox).
SoCal Connected: This new installment examines efforts by the U.S. military to "go green" by finding alternative sources of fuel and energy (9 p.m. KCET).
Great Performances: Tony Bennett sings duets with contemporary artists, including Amy Winehouse (in her last recordings), Lady Gaga, Norah Jones, Faith Hill, Carrie Underwood and Willie Nelson (9 p.m. KOCE).
Austin City Limits: Fleet Foxes and indie rocker Joanna Newsom perform (9 p.m. KLCS).
Bering Sea Gold: This new dangerous profession series features crews on dredges that attempt to harvest gold from the bottom of the frigid Bering Sea (10 p.m. Discovery).
Spartacus: Vengeance: The blood-and-guts drama returns with a new lead actor (Liam McIntyre) who replaces the late Andy Whitfield. This season Spartacus leads a slave revolt while hunting the ruthless Roman commander who took him from his home. Manu Bennett and Lucy Lawless also star (10 p.m. Starz).
Merlin: A mysterious stranger, Julius Borden (James Callis), arrives in Camelot with big news that could change the kingdom forever: He's found a way into the tomb of Ashkanar, an ancient mausoleum where the last of the dragon eggs resides. Colin Morgan and Bradley James (10 p.m. Syfy).
The Invisible Man: Claude Rains made his U.S. screen debut in this 1933 horror classic— based on the H.G. Wells story — as a scientist who discovers a formula that makes him disappear. Unfortunately, it also turns him into a crazed killer. Gloria Stuart ("Titanic") also stars (8:15 p.m. TCM).
Tennis: 2012 Australian Open: Men's second semifinal (9 a.m. ESPN2); women's final (Midnight ESPN2).
Pro basketball: The Knicks visit the Heat (5 p.m. ESPN).