Don't try to sneak up on a shark.
First, it's rude, and the shark might take offense. Second, most of them can see almost as well behind them as they can in front, according to the Discovery Channel, which is unleashing another "Shark Week" starting Sunday.
The 24th annual sharkapalooza will feature "Saturday Night Live" star Andy Samberg as Chief Shark Officer as well as the host of the special "Shark City" (9 p.m. EDT Thursday, Aug. 4).
"Shark City" has Samberg in the Bahamas and introducing the audience to specific groups of sharks that live off the shores of Nassau. Samberg will explain what they like to eat and what scares them.
The week kicks off with "Great White Invasion" (9 p.m. Sunday). The special looks at why great whites are turning up closer to shore and swimming nearer humans.
"Jaws Comes Home" (10 p.m. Sunday) follows five great whites as they journey up and down the Eastern Seaboard.
These are just some of the new programs airing as part of "Shark Week."
Other highlights for the week of July 31 to Aug. 6 (listings subject to change; check local listings):
"Wilfred" (noon, IFC). Eight episodes of the original Australian version of the dark comedy -- about an insecure man whose best friend is someone only he can see and is wearing a dog suit -- are featured in this marathon.
"American Ninja Warrior" (9 p.m., G4). A third season, and with a grander prize at stake, opens on this competition in which athletes must try to overcome unforgiving obstacle courses.
"Against the Wall" (10 p.m., Lifetime). An ambitious police officer (Rachael Carpani) gets promoted to detective, though her family and co-workers aren't pleased with the news.
"Koran by Heart" (9 p.m., HBO). An annual Koran-reciting contest is the center of this documentary that follows competitors through the paces.
"Billy The Exterminator" (9 p.m., A&E). A fourth season crawls onto your screens in this reality show about a family and its pest-control business.
"The Middle" (8 p.m., ABC). In one of the funnier episodes from the past season, Heck family members get on a plane and become the passengers from hell.
"Roseanne's Nuts" (9 p.m., Lifetime). Roseanne, Phyllis Diller and Sandra Bernhard go out for a night of drinking. The next morning, their livers ask for an apology.
"Glee" (9 p.m., Fox). Carol Burnett shows up as Sue's Nazi-hunting mother in this heartwarming repeat from the past season.
"Michael Ian Black: Very Famous" (11 p.m., Comedy Central). The performer, whose credits include "The State" and "Stella," gets the stage all to himself in this special.