“Mythbusters” (9 p.m., Discovery Channel): The summer programming tradition known as
“Mythbusters” (9 p.m., Discovery Channel): The summer programming tradition known as Shark Week returns for its 21st year to celebrate that mysterious toothy creature of the sea. Kicking things off is a special edition of “Mythbusters,” which attempts to answer a number of questions about sharks, including: Are they repelled by chili powder and magnets?
“The Next Food Network Star” (10 p.m., Food Network): Just who is “The Next Food Network Star”? We’ll find out tonight as Season 4 of the popular reality series culminates with a battle between the final three contestants. The winner becomes the host of a new show.
“Mad Men” (10 p.m., AMC): It captured the Golden Globe for best drama and recently picked up 16 Emmy nominations. Yet this sleek, stylish and sexy period drama is still an unknown commodity for many viewers. Now, as Season 2 opens, it’s a good time to get acquainted with Don Draper (Jon Hamm) and his band of hedonistic, 1960s-era advertising executives as they practice the art of the sell in the boardroom and the bedroom. Moody and mysterious, “Mad Men” is packed with sharp writing and exceptional performances by a cohesive, top-notch cast.