Fringe returns to Fox TV tonight with a big, shiny lead-in from American Idol, which will presumably deliver more than a few new viewers to the show, which has been hovering around the 9 million viewer mark with most of its new episodes. People who are already fans, though, won't have to sit through a reintroduction of the series.
The series boasts one of Hollywood's most creative producers in J.J. Abrams and a strong leading lady in Anna Torv as Olivia Dunham, an FBI agent tracking paranormal cases. She's joined by a previously institutionalized genius Dr. Walter Bishop (John Noble), and his estranged, hothead son, Peter (Joshua Jackson). Tonight, the teams tries to solve the murder of an esteemed epidemiologist, which might be linked to Olivia's recent abduction. (9 p.m. WBFF, Channel 45)
Energized:: Nova explores California's efforts to ensure a sustainable energy future including conservation and the development of new sources of carbon-free power. (8 p.m., MPT Channels 22 and 67)
Ruined reunion:: Is it getting hot in here? Sparks fly on The Biggest Loser when one contestant is allowed to reunite with a teammate at home amid accusations of not trying hard enough. (8 p.m., WBAL, Channel 11)
Late night guests: : Actor Charlie Sheen visits The Tonight Show with Jay Leno and comic Jerry Seinfeld stops by Late Show with David Letterman.