Amazing Race 17
The six remaining teams fly from Russia to Oman, where several surprises await them. But perhaps the biggest shock happens to Stephanie. During the leg, her boyfriend Chad proposes to her. As for the race itself, the pairs dangle from a rock mountain and try to avoid deadly mistakes like the one that proved "fatal" to father-son team Michael and Kevin Wu last week when they failed to correctly read a clue. — Tim Holland
Read on for previews of Betty White: America's Golden Girl, Extreme Makeover: Home Edition, Sunday Night Football, Sarah Palin's Alaska, Tina Fey: The Mark Twain Prize and Bored to Death.
Smallville (Friday, 8/7c, The CW)
Before she was a desperate housewife, Teri Hatcher was a memorably dithery Lois on the mid-'90s hit Lois & Clark: The New Adventures of Superman. Now she's coming full circle in a guest cameo as the new Lois Lane's dearly departed ...