A&E (7pm - 4am): CRIMINAL MINDS Marathon

Animal Planet (3pm - 10pm): WHALE WARS: THE AFTERMATH Marathon

Biography (7pm - 4am): AMERICAN GANGSTER Marathon

Chiller (9am - 5pm): AMERICAN GOTHIC Marathon

Comedy Central (8pm - Midnight): COMEDY CENTRAL PRESENTS Marathon

Discovery (8pm - 2am): ALASKAN CRAB FISHING Marathon

Disney (6pm - 10pm): GOOD LUCK CHARLIE Marathon

History  (8am - 1pm; 2pm - 7pm): PATTON 360 Marathon

Logo (6pm - Midnight): BUFFY THE VAMPIRE SLAYER Marathon

MSNBC (10pm - 5am): LOCKUP Marathon

MTV2 (6am - 11am): BAM'S UNHOLY UNION Marathon

MTV2 (5pm - 9pm):  NITRO CIRCUS Marathon

Oxygen (8am - 6pm): ROSEANNE Marathon

Science (9am - 4pm): MANTRACKER Marathon

Science (8pm - 3am): HOW IT'S MADE / FACTORY MADE Marathon

SPEED (Noon - 7pm): NASCAR HALL OF FAME BIOGRAPHY Marathon & Induction Ceremony

Spike (9am - 9:30pm): CSI Marathon

Syfy (9am - 5am): Syfy Movie Marathon (9am AVALANCHE: NATURE UNLEASHED; 11am FIRE AND ICE; 1pm POST IMPACT; 3pm SASQUATCH MOUNTAIN; 5pm ICE SPIDERS; 7pm WYVERN; 9pm YETI; 11pm ABOMINABLE; 1am ICE SPIDERS; 3am POST IMPACT)

TLC (5pm - 10pm; 11pm - 3am): SAY YES TO THE DRESS Marathon

truTV (9pm - 4am): FORENSIC FILES Marathon

Turner Classic Movies (6:30am - 6:30am): 72 Hours of War Films (6:30am THE LOST PATROL; 7:15am DIVE BOMBER; 9:30am THIRTY SECONDS OVER TOKYO; Noon COMMAND DECISION; 2pm GOD IS MY CO-PILOT; 3:30pm BATTLEGROUND; 5:30pm SERGEANT YORK; 8pm STALAG 17; 10:15pm THE GREAT ESCAPE; 1:15am THE BRIDGE ON THE RIVER KWAI; 4am KING RAT)

USA  (6pm - 1am): NCIS Marathon

Versus (5pm - 11pm): WHACKED OUT SPORTS Marathon

Weather Channel (8pm - 2am): TORNADO ROAD Marathon

A&E (11am - 6pm): FLIP THIS HOUSE Marathon

Animal Planet (1pm - 7pm): RIVER MONSTERS Marathon

BBC America (8pm - 8am): DOCTOR WHO Marathon

BET (10am - 7pm): EVERYBODY HATES CHRIS Marathon

Biography (8pm - 3am): CELEBRITY GHOST STORIES Marathon

Bravo (9pm - 2am): HOUSE Marathon

Centric (10am - 6am): THE A-TEAM Marathon

Chiller (9am - 5pm): TWIN PEAKS Marathon

Discovery (Noon - 3am): DEADLIEST CATCH Marathon

Discovery Health (8pm - Midnight): EMERGENCY LEVEL ONE Marathon

Disney (Noon - 10pm; 11:30pm - 3am): SUITE LIFE ON DECK Marathon

Disney XD (8am - 1am): ZEKE AND LUTHER / KICK BUTTOWSKI Marathon

Fuse (11am - 6am): MARIAH CAREY TAKEOVER

G4 (9am - 7pm): NINJA WARRIOR Marathon

Golf Channel (6:30pm - 9:30pm): THE HANEY PROJECT Marathon

HBO (9pm - 10:45pm): THE SPECIAL RELATIONSHIP (world movie premiere)

History (9am - 7pm): WWII in HD Marathon

Investigation Discovery (8pm - 2am): I ALMOST GOT AWAY WITH IT Marathon

MSNBC (Noon - 7am): LOCKUP: Colorado & Raw Marathon

MTV2 (6am - 11am): ROB & BIG Marathon

MTV2 (11am - 3pm): NITRO CIRCUS Marathon

MTV2 (3pm - 9pm): VIVA LA BAM Marathon

Nat Geo: Taliban/Al Qaeda Marathon of Episodes & Specials (CRITICAL SITUATION: "Taliban Uprising" & "Al Qaeda Ambush"; THE FINAL REPORT: "Osama's Escape"; INSIDE THE TALIBAN; BIN LADEN'S SPY; INSIDE AL QAEDA; IRAN AND THE WEST)

Nickelodeon (11am - 3pm): SPONGEBOB SQUAREPANTS Marathon

Oxygen (8am - 8pm): AMERICA'S NEXT TOP MODEL Marathon

Planet Green (5am - 10am): RENOVATION NATION Marathon

Science (7am - 1pm): MASTER BLASTERS Marathon

Science (4pm - 2am): BUILD IT BIGGER Marathon

Spike (6pm - 10pm): UFC Marathon (UFC Primetime; UFC 114 Countdown; UFC Unleashed; UFC Unleashed; UFC 114)

Sundance (5pm - 9pm): LIVE FROM ABBEY ROAD Marathon

Syfy (9am - 5am): Syfy Movie Marathon (9am DEATH TUNNEL; 11am HALLOWED GROUND; 1pm 100 FEET; 3pm OPEN GRAVES; 5pm JOYRIDE 2: DEAD AHEAD; 7pm WRONG TURN 2: DEAD END; 9pm WRONG TURN; 11pm SHALLOW GROUND; 1am GHOULS; 3am THE SHAFT)

TLC (9am - 1pm): THE LITTLE COUPLE Marathon

TLC (3pm - 9pm): 48 HOURS: HARD EVIDENCE Marathon

truTV (Noon - 6pm): DOMINICK DUNNE'S POWER, PRIVILEGE, AND JUSTICE Marathon

Turner Classic Movies (6:30am - 6:30am): 72 Hours of War Films (6:30am YOU'RE IN THE ARMY NOW; 8am BUCK PRIVATES; 9:30am IN HARM'S WAY; 12:30pm BATTLE OF THE BULGE; 3:15pm THE BATTLE OF BRITAIN; 5:30pm MIDWAY; 8pm THE BEST YEARS OF OUR LIVES; 11pm PRIDE OF THE MARINES; 1:15am BIRDY; 3:30am LET THERE BE LIGHT; 4:45am THE SECRET INVASION)

TV Land (4:30pm - 8pm): THE ANDY GRIFFITH SHOW Marathon

TV Land (8pm - Midnight): EVERYBODY LOVES RAYMOND Marathon

TV One (Noon - 4:30pm): LISARAYE: THE REAL MCCOY Marathon

TV One (4:30pm - 6am): MARTIN Marathon

USA (9am - 4pm): ROYAL PAINS Marathon

USA (4pm - 2am): LAW & ORDER: SVU Marathon

VH1 Classic (All Day): '80 VIDEOS: A TO Z Marathon

WE tv (10am - 2pm): MY FAIR WEDDING Marathon

WE tv (2pm - 5am): BRIDEZILLAS Marathon

A&E (1pm - 5pm): PARKING WARS Marathon

A&E (5pm - 4am): BILLY THE EXTERMINATOR Marathon

Animal Planet (4pm - 6am): RIVER MONSTERS Marathon

BBC America (2pm - 8pm): DOCTOR WHO Marathon

BBC America (8pm - 5am): STAR TREK: THE NEXT GENERATION Marathon

Biography (7am - 4am): I SURVIVED Marathon

Bravo (11am - 6pm): REAL HOUSEWIVES Marathon: NEW JERSEY (11am - 2pm); NEW YORK CITY (2pm - 6pm)

Centric (9am - 6am): THE A-TEAM Marathon

Chiller (9am - 5pm): FOREVER KNIGHT Marathon

Comedy Central (3pm - 9pm): TOSH.0 Marathon

Discovery (9am - 3am): DEADLIEST CATCH Marathon

Discovery Health (Noon - 8pm): INSIDE BROOKHAVEN OBESITY CLINIC Marathon

Disney (Noon - 9pm; Midnight - 3am): HANNAH MONTANA Marathon

Disney XD (7:30am - 11:30pm): PHINEAS AND FERB / I'M IN THE BAND Marathon

Encore Western (8pm - 6am): Six Gun Salute to John Wayne (8pm RED RIVER; 10:15pm THE UNDEFEATED; 12:15am RIDERS OF DESTINY; 1:10am BLUE STEEL; 2:10am THE LUCKY TEXAN; 3:05am THE MAN FROM UTAH; 4am 'NEATH ARIZONA SKIES; 5am RANDY RIDES ALONE)

Fine Living (4pm - 4am): Marathon of 15 Bodacious Specials (Outdoor Kitchens; Backyards; More Backyards; Outdoor Spaces; Kitchens; Bathrooms; Houses; Bedrooms; Kitchens; Bathrooms; Houses; Bedrooms)

Fuse (11am - 6am): BEYONCE TAKEOVER

G4 (10am - 1am): James Bond Movie Marathon (10am MOONRAKER; 1pm A VIEW TO A KILL; 4pm OCTOPUSSY; 7pm MOONRAKER; 10pm A VIEW TO A KILL)

GAC (8pm - 10pm): Memorial Day Tribute

GSN (6pm - Midnight): HIGH STAKES POKER Marathon

Hallmark (7am - 3am): Marathon of "Love" Movies Based on the Books of Janette Oke (7am LOVE COMES SOFTLY; 9am LOVE'S ENDURING PROMISE; 11am LOVE'S LONG JOURNEY; 1pm LOVE'S ABIDING JOY; 3pm LOVE'S UNENDING LEGACY; 5pm LOVE'S UNFOLDING DREAM; 7pm LOVE TAKES A WING; 9pm LOVE FINDS A HOME; 11pm LOVE COMES SOFTLY; 1am LOVE'S ENDURING PROMISE)

HBO2 (2pm - 7pm): THE PACIFIC Marathon: Parts 1-5

History (1pm - 11pm): AMERICA THE STORY OF US Marathon

Investigation Discovery (2pm - 10pm): 48 HOURS: HARD EVIDENCE / 48 HOURS ON ID Marathon

ION (3pm - 11pm): SHARK Marathon

Lifetime (10am - 11pm): DROP DEAD DIVA Marathon

Military (8pm - 2am): ULTIMATE WEAPONS Marathon

MTV (6am - 5am): TRUE LIFE Marathon

MTV2 (8am - 11:30am): PIMP MY RIDE Marathon

MTV2 (2:30pm - 6pm): WILD 'N OUT Marathon

Nat Geo Wild (6pm - 4am): DANGEROUS ENCOUNTERS Marathon

Nickelodeon (Noon - 5pm): iCARLY Marathon

Nickelodeon (5pm - 8pm): VICTORIOUS Marathon

Oxygen (8:30am - 3:30pm): AMERICA'S NEXT TOP MODEL Marathon

PBS (8pm - 9:30pm): National Memorial Day Concert. Guests include Lionel Richie, Brad Paisley, Katherine Jenkins, Kelli O'Hara and Yolanda Adams.

Planet Green (8pm - 5am): RAGING PLANET Marathon

Science (6am - Noon): COLOSSAL CONSTRUCTION Marathon

Science (Noon - 3am): HOW DO THEY DO IT? Marathon

Spike (9am - 4am): STAR WARS Movie Marathon (9am THE PHANTOM MENACE; 12:10pm ATTACK OF THE CLONES; 3:25pm REVENGE OF THE SITH; 6:40pm A NEW HOPE; 9:40pm THE EMPIRE STRIKES BACK; 12:40am RETURN OF THE JEDI)

Style (9pm - 3am): CLEAN HOUSE: THE SEARCH FOR THE MESSIEST HOME Marathon

Syfy (9am - 5am): Syfy Movie Marathon (9am DINOCROC; 11am SNAKEHEAD TERROR; 1pm SPRING BREAK SHARK ATTACK; 3pm MEGA SHARK VS GIANT OCTOPUS; 5pm SEA BEAST; 7pm LAKE PLACID 2; 9pm MEGA PIRANHA; 11pm SUPERGATOR; 1am SHARKS IN VENICE; 3am HAMMERHEAD: SHARK FRENZY)

TLC (Noon - 3pm): ONE BIG HAPPY FAMILY Marathon

TLC (3pm - 8pm): LA INK Marathon

Travel Channel (5pm - 3am): Marathon of EXTREME Specials (Truck Stops; Towns; Resorts; Pools; Waterparks; Terror Rides; Competitions; Pools; Waterparks; Terror Rides)

Turner Classic Movies (6:30am - 7am): 72 Hours of War Films (6:30am BATTLE CRY; 9:30am DARBY'S RANGERS; Noon THE DIRTY DOZEN; 2:45pm THE GUNS OF NAVARONE; 5:30pm THE GREEN BERETS; 8pm MISTER ROBERTS; 10:15pm OPERATION PETTICOAT; 12:30am FOUR SONS; 2:45am PAISAN; 5am NAZTY NUISANCE)

TV Guide Network (Noon - 5pm): PUNK'D Marathon

TV Land (4pm - 8pm): THE ANDY GRIFFITH SHOW Marathon

TV One (Noon - 2am): LINCOLN HEIGHTS Marathon

USA (11am - 11pm): LAW & ORDER: SVU Marathon

VH1 Classic (All Day): '80 VIDEOS: A TO Z

WE tv (2pm - 6pm): MY FAIR WEDDING Marathon

WE tv (6pm - 10pm): BRIDEZILLAS Marathon

WE tv (10pm - 5am): GIRL MEETS GOWN Marathon

A&E (8am - 11pm): HOARDERS Marathon

AMC (9am - 6:30am): AMC War Heroes Movie Marathon with Gen. David Petraeus (9:30am THE DEVIL'S BRIGADE; 12:30pm THE ENEMY BELOW; 2:45pm TO HELL AND BACK; 5:15pm THE BIG RED ONE; 8pm HEARTBREAK RIDGE; 11pm COURAGE UNDER FIRE; 1:30am HAMBURGER HILL; 4am WAKE ISLAND)

Animal Planet (1pm - 6am): RIVER MONSTERS Marathon

BBC America (8am - 7pm): STAR TREK: THE NEXT GENERATION Marathon

BET (10am - 11pm): THE GAME Marathon

Biography (8am - 7pm): CITY CONFIDENTIAL Marathon

Boomerang (Noon - Midnight): TEEN TITANS Marathon

Bravo (10am - 2am): REAL HOUSEWIVES Marathon: NEW JERSEY (10am - 2pm); NEW YORK CITY (2pm - 6pm); NEW JERSEY (6pm - 2am)

CMT (2pm - 8pm): WORLD'S STRICTEST PARENTS Marathon

Cooking Channel (All Day, Starting at 7am): New Channel and Multiple Series Premieres

Discovery (9am - 3am): DEADLIEST CATCH Marathon

Discovery Health (Noon - 8pm): DR. G: AMERICA'S MOST SHOCKING CASES Marathon

Disney (Noon - 10pm): PHINEAS AND FERB Marathon

Disney XD (8am - 9:30pm): ZEKE AND LUTHER / KICK BUTTOWSKI Marathon

DIY (7am - Midnight): Grillin' & Chillin' Memorial Day Marathon

E! (8:30am - 5pm): KARDASHIAN Marathon: KEEPING UP (8:30am - 1pm); KOURTNEY & KHLOE (1pm - 5pm)

Encore (7am - 2am): When Heroes Are Born Movie Marathon (7am JOHN FORD GOES TO WAR; 8am MACARTHUR; 10:15am BAT*21; Noon GLORY; 2:05pm MIRACLE AT ST. ANNA; 4:50pm PEARL HARBOR; 8pm PATTON; 10:50pm BLACK HAWK DOWN)

Encore Western (6am - 6:30am): Six Gun Salute to John Wayne (6am SAGEBRUSH TRAIL; 7am THE STAR PACKER; 8am THE TRAIL BEYOND; 9am WEST OF THE DIVIDE; 10am DAWN RIDER; 11am DESERT TRAIL; Noon THE LAWLESS FRONTIER; 12:50pm PARADISE CANYON; 1:50pm TEXAS TERROR; 2:45pm IN OLD CALIFORNIA; 4:20pm DAKOTA; 5:50pm NORTH TO ALASKA; 8pm MCLINTOCK!; 10:05pm THE ALAMO; 12:50am MANY RIVERS TO CROSS; 2:30am RED RIVER; 4:10am TEXAS TERROR; 5:05am DAKOTA)

Food Network (10am - 4pm): GRILL IT Marathon

Fuse (11am - 6am): LADY GAGA TAKEOVER

G4 (Noon - 1am): COPS Marathon

Hallmark (9am - 2:30am): Hallmark Hall of Fame Movie Marathon (9am FRONT OF THE CLASS; 11am THE MAGIC OF ORDINARY DAYS; 1:15pm PLAINSONG; 3:30pm THE VALLEY OF LIGHT; 5:45pm FRONT OF THE CLASS; 8pm THE MAGIC OF ORDINARY DAYS; 10:15pm PLAINSONG; 12:30am THE VALLEY OF LIGHT)

HBO2 (2pm - 7pm): THE PACIFIC Marathon: Parts 6-10

History (8am - 9pm): PAWN STARS Marathon

Investigation Discovery (Noon - 6pm): I ALMOST GOT AWAY WITH IT Marathon

Investigation Discovery (6pm - 1am): SOLVED: EXTREME FORENSICS Marathon

ION (4pm - Midnight): CRIMINAL MINDS Marathon

Lifetime (11am - 11:30pm): Meg Ryan Movie Marathon (11am MY MOM'S NEW BOYFRIEND; 1pm WHEN HARRY MET SALLY; 3pm HANGING UP; 5pm IN THE LAND OF WOMEN; 7pm SERIOUS MOONLIGHT; 9pm SLEEPLESS IN SEATTLE)

Military (6am - 2pm;  4pm - 8pm): WORLD AT WAR Marathon

Military (2pm - 4pm): Memorial Day Parade

MSNBC (11am - 5am): CAUGHT ON CAMERA Marathon

MTV (2pm - 11pm): JERSEY SHORE Marathon

MTV2 (9am - 6pm): AMERICAN GLADIATORS Marathon

MTV2 (9pm - 3am): JACKASS Marathon

Nat Geo (2pm - 3am): HOOKED Marathon

Nat Geo Wild (6pm - 4am): CAUGHT IN THE ACT Marathon

NickToons (10am - 2pm; 9pm - 1am): DRAGON BALL Z KAI Marathon

NickToons (2pm - 9pm): AVATAR: THE LAST AIRBENDER Marathon

Oxygen (6am - 11pm): TORI & DEAN Marathon

Planet Green (8pm - 2am): FUTURE FOOD Marathon

Science (6am - 3am): HOW IT'S MADE Marathon

Sleuth (6am - 6am): THE UNIT Marathon

SOAPnet (8am - 6pm): Star-Spangled Marathon of BEVERLY HILLS, 90210, featuring celebrities before they were stars, including: Hilary Swank; Matthew Perry; Christina Aguilera; Daniel Cosgrove; Paul Johansson; Grant Show; Denise Richards; Eva Longoria; Josh Taylor; Jessica Alba; Ryan Seacrest; Vanessa Marcil; Vivica A. Fox.

Spike (9am - 2:30am): BAND OF BROTHERS Marathon

Style (6am - 3am): CLEAN HOUSE: THE SEARCH FOR THE MESSIEST HOME Marathon

Syfy (9am - 1am): Stephen King Movie/Miniseries Marathon (9am SOMETIMES THEY COME BACK AGAIN; 11am STEPHEN KING'S THE LANGOLIERS; 3pm STEPHEN KING'S THE STAND; 11pm CHILDREN OF THE CORN: REVELATIONS)

TeenNick (9am - 3pm): ZOEY 101 Marathon

TeenNick (3pm - 10:30pm): DRAKE & JOSH Marathon

TLC (6am - 3am): CAKE BOSS Marathon

TNT (10am - 6pm): LAW & ORDER Marathon

Travel Channel (9am - 4pm): Marathon of PARADISE Specials (Breakfast; Ice Cream; Barbecue; Hot Dog; Hamburger; Steak)

Travel Channel (4pm - 11pm): BIZARRE FOODS WITH ANDREW ZIMMERN Marathon

truTV (9am - 3pm): OCEAN FORCE: PANAMA Marathon

Turner Classic Movies (6am - 5:30am): TCM Salutes Clint Eastwood (6am THE FIRST TRAVELING SALESLADY; 8am A FISTFUL OF DOLLARS; 9:45am FOR A FEW DOLLARS MORE; Noon THE GOOD, THE BAD AND THE UGLY; 3pm HANG 'EM HIGH; 5pm WHERE THE EAGLES DARE; 8pm KELLY'S HEROES; 10:30pm THE EASTWOOD FACTOR; 12:15am DIRTY HARRY; 2am MAGNUM FORCE; 4:15am THE EASTWOOD FACTOR)

TV Land (8am - 4pm): BEWITCHED Marathon

TV Land (4pm - 9pm): SANFORD & SON Marathon

TV One (Noon - Midnight): THE TRACY MORGAN SHOW Marathon

USA (6am - 9pm): NCIS Marathon

Versus (1pm - 3am): WORLD EXTREME CAGEFIGHTING Marathon

VH1 (1pm - 10pm): TOUGH LOVE COUPLES Marathon

VH1 Classic (All Day, Ending at 7pm): '80 VIDEOS: A TO Z

WE tv (10am - 5am): BRIDEZILLAS Marathon