Garbage Moguls (8pm, National Geographic Channel) - A new series documenting the work at TerraCycle Inc, a green company that makes products from trash. Three episodes in a row air tonight. In the first, the company makes a line of pet products from recycled dog food bags. In the second episode at 9pm, plastic trash cans are made from potato chip bags and fishing lures are made from old cds. And at 10pm, investors offer TerraCycle a retail store for free, but the catch is they have to renovate, design, and stock it in 24 hours.

Persons Unknown (8pm, NBC) - The group feel confined and uneasy after learning they'll be restricted to the hotel, and things only get worse when they find personal items in their rooms. 

Lake Placid 3 (9pm, Syfy) - A game warden (Colin Ferguson) moves into his aunt's lakeside cabin with his wife and young son. The little boy feeds the resident baby crocodiles until they grow up to be monstrous creatures that meanace the family.

Guitar Center Sessions: Peter Gabriel (9pm, Network 101) - The premiere of a new series from featuring musicians answering questions from an audience and performing their work. Only available on DirecTV.

Who is the Real Joran van der Sloot (10pm, A&E) - An examination of the murder case against Joran van der Sloot through forensic evidence, psychological examinations, and opinions from those who know him. Van der Sloot is accused in the 2005 disappearance of Natalee Holloway and recently confessed to killing a woman in Peru.