Apparently, someone had the bright idea to turn Nick Lachey and his ditzy wife, Jessica Simpson,

Apparently, someone had the bright idea to turn Nick Lachey and his ditzy wife, Jessica Simpson, into the new Sonny and Cher. And so we get "The Nick & amp; Jessica Variety Hour" (9 p.m., ABC), a special that includes guest appearances by Jewel, Babyface, Mr. T, Kermit the Frog and Miss Piggy. Proceed at your own risk.
L is for "last," at least for now, as "The L Word" (10 p.m., Showtime) airs its season finale. For viewers who haven't yet sampled this brash, sexy serial, better late than never. "The L Word" has gotten better every week. With its arrival in January, the series seized attention and raised eyebrows for focusing on the lives of lesbians. But it goes further than that, portraying a group of attractive, bright, relationship-troubled Los Angelenos with whom just about any viewer can identify.
Moviegoers may recall how, in the 1996 drama "Fly Away Home," a teenage girl and her father train a flock of orphaned Canada geese chicks to fly, then pilot an ultralight aircraft to lead the birds on their first migration. PBS's "Nature" (7 p.m., PBS) gives viewers a look at how humans really can serve as such surrogate parents to orphaned birds -- in particular, a flock of the highly endangered whooping cranes. The program, "Flight School," follows the scientists of Operation Migration as they prepare their first "class" of 10 whoopers to fly from Wisconsin to Florida -- a migration of more than 1,200 miles.