Broken Tail: A Tiger's Last Journey (8pm, UNC-TV) - In this "Nature" special, wildlife filmmaker Colin Stafford-Johnson follows the trek of Broken Tail, a 2-year-old tiger that disappeared from a tiger reserve in India and was killed by a train 100 miles away. Stafford-Johnson had spent 600 days filming Broken Tail and his family prior to the disappearance.
Amazing Race: Unfinished Business (8pm, CBS) - The 18th season starts with 11 former losing teams getting a second chance at the $1 million prize. The race starts in Palm Springs, California, and continues to Sydney, Australia, where the teams swim with sharks.
Saturday Night Live Backstage (9pm, NBC) - A two-hour behind-the-scenes special that focuses on the guest host experience. Told through clips and interviews.
Big Love (9pm, HBO) - Barb's choice of an ally in her pursuit of the priesthood displeases her mother (Ellen Burstyn) and Bill faces a Mormon boycott of his stores.
Episodes (9:30pm, Showtime) - In the season finale, the disastrous "Puck!" pilot wraps and a disappointed Sean (Stephen Mangan) and Beverly (Tamsin Greig) prepare to return to London. A final goodbye between Matt LeBlanc and Sean (left) takes an unexpected turn thanks to a missing Jaguar, a red-nosed reindeer, and cinnamon. There's some really funny physical comedy in this episode. Looking forward to a Season 2!
CSI: Miami (10pm, CBS) - The man who murdered Horatio's returns and spreads violence across Miami. Add in a ticking puck at an NHL All-Star game and we might have another "Threat Level Midnight" on our hands. Oops, wrong network.
Brothers & Sisters (10pm, ABC) - Nora is torn over a possible reconnection with her long-ago boyfriend Brody (Beau Bridges), and Justin tries to help a homeless veteran who doesn't want his help. Directed by Matthew Rhys, who plays Kevin on the show.