If, as they say, half of life is just showing up, the CW is in trouble. It’s decided not to show up at all and to rebroadcast summer filler from last July! What if CBS decided to repeat last year’s “Big Brother”? Would anybody watch? Maybe the CW figured nobody watched its shows in the first place.?

That said, “Plain Jane” (8 p.m., CW) is not half bad. “Jane” is hosted by fashion expert Louise Roe, who, like every expert on TV for the past decade, sports a British accent. In every episode, a nice, shy fashion disaster with self-esteem issues sends Roe an Internet video and begs to be saved from lonely Saturday nights.

“Jane” is based on the premise of any number of cookie-cutter chick flicks about dowdy damsels too timid and insecure to express their love to the guy they’ve had a crush on for eons. As reality series go, this isn’t a terrible idea. It’s “makeover series meets Jane Austen novel.” But the network obviously didn’t have enough faith in the idea to churn out a few new ones for the summer of 2011. Maybe it just thinks the show is like an old paperback you find in a summer rental house. Not your first choice for a beach read or a summer distraction, but it will do.?

• Tonight’s “Titans” (8 p.m., CNBC) profiles musician, arranger and business leader Quincy Jones, a prime mover in the culture business for six decades and counting. An arranger for the Count Basie Orchestra, he worked with Frank Sinatra among other greats. He produced Michael Jackson’s “Thriller,” still the biggest-selling recording of all time. Like leaders of any industry, he’ll also be remembered by the talent he discovered. And in Jones’ case, those proteges — most notably Will Smith and Oprah Winfrey — have done quite well.

Tonight’s other highlights

• “So You Think You Can Dance” (7 p.m., Fox), “Glee” (8 p.m., Fox).

• Michael and Holly’s public canoodling puts everyone else on edge on “The Office” (8 p.m., NBC).

• Michael figures prominently in a murder investigation on “Burn Notice” (8 p.m., USA).

• Jack frets about his baby’s citizenship on “30 Rock” (8:30 p.m., NBC).

• Murder in the antiques trade on “The Mentalist” (9 p.m., CBS).

• Bedbug apocalypse on “Love Bites” (9 p.m., NBC).

• Trapped in a meth lab on “Rookie Blue” (9 p.m., ABC).

• An old friend arrives in need on “Suits” (9 p.m., USA).

• Charity work on “Wilfred” (9 p.m., FX).

• Visiting relatives on “Louie” (9:30 p.m., FX).

• Young people turn to dealing in “True Life: I’m in the Marijuana Business” (9 p.m., MTV).

Cult choice

Children search for hidden treasure in the 1985 fantasy “The Goonies” (5 p.m., ABC Family), featuring a notable cast, including Josh Brolin (“True Grit”), Sean Astin (“Lord of the Rings”), Martha Plimpton (“Raising Hope”), Corey Feldman and Joe Pantoliano (“The Sopranos”).