"Al Roker Investigates: Kids, Cards and Dice" (8 p.m., Court TV): Studies have found that serious

"Al Roker Investigates: Kids, Cards and Dice" (8 p.m., Court TV): Studies have found that serious gambling habits are beginning to crop up in the nation's high schools and colleges. This special uses interviews with teens, young adults and experts to shed more light on the trend and examine what parents can do to prevent it from affecting their kids.
"Inside Grand Central" (8 p.m., National Geographic Channel): It's a symbol for relentless hustle and bustle. Now Grand Central Terminal gets a visit from National Geographic Channel in a documentary that tracks the many wonders of this 92-year-old landmark. Each day, 750,000 people pass through its 48 acres and under its "sky ceiling" with 2,500 stars. But few visitors stop to take full measure of its cavernous elegance. Nor would many imagine the network of underground tunnels and secret chambers lying deep below the main concourse. This two-hour special covers the history as well as the scope of this grand train station in New York.