TONIGHT'S MUST-SEES

"Weeds," 7 and 8 p.m., Showtime. As a fire rushed toward her neighborhood last season, Nancy (Mary-Louise Parker) burned her house to destroy the pot-selling evidence. Now she's on the run, heading toward in-laws (including Albert Brooks) who resent her. The result is dark, droll and quite funny. It could be a perfect, midcourse makeover.

"The Middleman" debut, 8 p.m., ABC Family, rerunning at 9. Wendy Watson is young, bright and woefully underemployed. She's a temp; nothing much happens in her life. Except then a giant gorilla leaps through a wall and a handsome hero rescues her and ... "Middleman" is a neat blend of humor and action. Kids can take it straight; grown-ups can savor the dry wit. Javier Grillo-Marxuach ("Lost") wrote a sharp show. Natalie Morales is perfect as Wendy, smartly sarcastic; Matt Keesler is ideal as the stereotype hero.

OF NOTE

"How Life Begins," 6 p.m., History. Hugely ambitious, this documentary asks questions it simply can't answer. After a slow start, however, scientists offer detailed explanations of life's inner-workings.

"The Bachelorette," 7 and 8 p.m., ABC. First, DeAnna Pappas pauses to discuss what's happened so far. Then she takes the six remaining guys to Palm Springs, Calif., including Frank Sinatra's former home.

"Psychic Kids" debut, 7 p.m., A&E. This documentary series is both fascinating and repulsive. Each week, three kids who describe paranormal visions meet Chip Coffey, a medium. The good news is that they get a feeling of not being alone. The bad: Coffey is a creepy sort, terrifying the kids for dramatic effect. This opener pushes a likable little girl hard.

"Nashville Star," 8 p.m., NBC. Last week's opener was loud and brash, with little faith in the music. Still, the talent and the judges were impressive; tonight, Trace Adkins guests.