The PBS series "Edens Lost and Found" does Los Angeles tonight at 10 pm on KCET. Jimmy Smits hosts the episode, which features TreePeople's Andy Lipkis and his crusade to plant trees and improve watershed management, Eli Broad and the Grand Avenue plan for downtown, and a segment on the Expo Line and Friends 4 Expo Transit.

Also on the schedule: KCET airs a documentary on the Colorado River Aqueduct at 8 pm and an episode of Huell Howser's "Downtown" (with LA Observed video blogger Jacob Soboroff) at 9:30 pm.