| Martin Kane, Private Eye | NBC | 7,344,000 | |
| Martin: The Reunion | BET | 447,000 | |
| Mary Kay Letourneau: Notes on a Scandal | ID | 621,000 | |
| Mary Makes It Easy | FN | 422,000 | |
| María de Todos Los Ángeles | GV | 46,000 | |
| María Félix | UniMás | 216,000 | |
| Mas Noche | GV | 20,000 | |
| Mash-Up Our Home | HGTV | 853,000 | |
| Masha and the Bear | UKIDS | 23,000 | |
| Mashle: Magic and Muscles | AS | 159,000 | |
| Masked Singer, The | FOX | 2,891,000 | |
| Master Minds | GSN | 516,000 | |
| Master of Disguise, The | HBO | 66,000 | |
| Master of Glass: The Art of Dale Chihuly | SMTH | 163,000 | |
| MasterChef | FOX | 1,550,000 | |
| MasterChef Junior | FOX | 1,488,000 | |
| Mastermind of Murder | Oxygen | 246,000 | |
| Masters Agility Championship | FOX | 588,000 | |
| Masters Golf Tournament | CBS | 12,990,000 | |
| Masters Golf Tournament | ESPN | 652,000 | |
| Masters Golf Tournament | ESPND | 28,000 | |
| Masters Golf Tournament | ESPN2 | 150,000 | |
| Masters of Illusion | CW | 347,000 | |
| Masters Par 3 Contest | ESPN | 650,000 | |
| Masters Par 3 Contest | ESPN2 | 303,000 | |
| Masters Series | TC | 362,000 | |
| Match Conversation, The | TBS | 268,000 | |
| Match Conversation, The | TNT | 346,000 | |
| Match Game | ABC | 2,403,000 | |
| Match Game | CBS | | |
| Match Game | NBC | | |
| Match Game | SYN | | |
| Match Me Abroad | TLC | 580,000 | |
| Match PreGame, The | HLN | 101,000 | |
| Match PreGame, The | TBS | 191,000 | |
| Match PreGame, The | TNT | 149,000 | |
| Match PreGame, The | TRU | 61,000 | |
| Match, The | HLN | 106,000 | |
| Match, The | TBS | 374,000 | |
| Match, The | TNT | 390,000 | |
| Match, The | TRU | 74,000 | |
| Match: Superstars, The | TNT | 165,000 | |
| Materialists | HBO | 142,000 | |
| Mathis Family Matters | Bravo | 439,000 | |
| Mathis Family Matters | E! | 167,000 | |
| Matlock | CBS | 1,670,000 | |
| Matriarch of Murder? | ID | 608,000 | |
| Matrix Resurrections, The | HBO | 377,000 | |
| Matter of Fact with Soledad O'Brien | FYI | 25,000 | |
| Matthew Perry: Thanks for Being a Friend | N@N | 453,000 | |
| Matthew Perry: The Diane Sawyer Interview | ABC | 4,390,000 | |
| Matthew Shepard Story, The | ID | 400,000 | |
| Maui Rising | ABC | 1,734,000 | |
| Maui Shark Mystery | NG | 358,000 | |
| Maui Shark Mystery | NGW | 125,000 | |
| Max on Boxing | ESPN2 | 87,000 | |
| Mayans M.C. | FX | 491,000 | |
| Mayfair Witches | AMC | 217,000 | |
| Mayfair Witches | BBCA | 136,000 | |
| Mayfair Witches | IFC | 131,000 | |
| Mayfair Witches | STV | 98,000 | |
| Mayfair Witches | We TV | 165,000 | |
| Mayfair Witches Marathon | AMC | 96,000 | |
| Mañanitas a Santa María Guadalupe | GV | 60,000 | |
| McBee Dynasty: Real American Cowboys, The | Bravo | 365,000 | |
| McBee Dynasty: Real American Cowboys, The | USA | 279,000 | |
| McMillions | CNN | 358,000 | |
| Me Caigo de Risa | GV | 36,000 | |
| Me Caigo de Risa | UNI | 404,000 | |
| Me or the Menu | FN | 214,000 | |
| MEAC/SWAC Kick-Off | ABC | 867,000 | |
| Mean Girl Murders | ID | 382,000 | |
| Mecha Builders | CN | 63,000 | |
| Mechashark | DISC | 344,000 | |
| Mechashark: Love Down Under | DISC | 382,000 | |
| Mecum Auto Auctions: Muscle Cars & More | DISC | 102,000 | |
| Mecum Auto Auctions: Muscle Cars & More | Discovery Turbo | 262,000 | |
| Mecum Full Throttle | Discovery Turbo | 73,000 | |
| Mecum Main Attractions | Discovery Turbo | 212,000 | |
| Mecum Presents: Automotive Archeology | Discovery Turbo | 147,000 | |
| Mecum Top 10 | Discovery Turbo | 233,000 | |
| Media Buzz | FNC | 1,816,000 | |
| Medio del Desastre, En | DSE | 37,000 | |
| Meerkat Manor: Rise of the Dynasty | BBCA | 64,000 | |
| Meet the Batwheels | CN | 40,000 | |
| Meet the Press | MS | 205,000 | |
| Meet the Press Film Festival | MS | 219,000 | |
| Meet the Press with Chuck Todd | NBC | 2,539,000 | |
| Meet the Press with Kristen Welker | NBC | 3,020,000 | |
| Meet, Marry, Murder | Lifetime | 188,000 | |
| Meg 2: The Trench | HBO | 413,000 | |
| Mega Hammerhead | DXD | 105,000 | |
| Mega Jaws of Bird Island | DISC | 398,000 | |
| Mega Monsters | Trvl | 208,000 | |
| Mega Predators of Oz | DISC | 409,000 | |
| Mega-Brands that Built America, The | History | 486,000 | |
| Megamind: The Button of Doom | CN | 196,000 | |
| Megasharks of Dangerous Reef | DISC | 621,000 | |
| Mehdi Hasan Show, The | MS | 447,000 | |
| Mehdi Hasan: The Choice | MS | 254,000 | |
| Mejor de Copa Libertadores, Lo | BeIN-E | 27,000 | |
| Melania | FNC | 1,525,000 | |
| Memorial Day MovieFest | TBS | 444,000 | |
| Memorial Day Movies | TNT | 559,000 | |
| Memory Box: Echoes of 9/11 | MS | 330,000 | |
| Men in Black 3 | CN | 206,000 | |
| Men Who Built America, The | History | 535,000 | |
| Men's International Friendly | FOX | 866,000 | |
| Menendez Brothers: Misjudged? | ID | 524,000 | |
| Mensaje a la Nación de Biden | CNNE | 16,000 | |
| Mentalidad Asesina | DSE | 70,000 | |
| Menu, The | HBO | 346,000 | |
| Men’s College Basketball | ABC | 911,000 | |
| Merry 80's Marathon | AMC | 649,000 | |
| Merry Holiday Marathon | BBCA | 171,000 | |
| Merry Madagascar | NJR | 143,000 | |
| Merry Madagascar | Nick | 143,000 | |
| Merry Saturday Marathon | BBCA | 222,000 | |
| Merry Scary Christmas | Trvl | 182,000 | |
| Mesa Caliente: Sin Censura, La | TEL | 698,000 | |
| Messyness | MTV | 157,000 | |
| Metal Monsters: The Righteous Redeemer | DISC | 138,000 | |
| Metallica: Helping Hands Concert | MTV | 79,000 | |
| Metalocalypse: Army of the Doomstar | AS | 122,000 | |
| Method of a Serial Killer | Oxygen | 218,000 | |
| Mexican First Division | ESPND | 289,000 | |
| Mexican National Team | FOXD | 158,000 | |
| Mexicana y el Güero, La | UNI | 900,000 | |
| Mexico Life | HGTV | 367,000 | |
| Mexicánicos | DSE | 30,000 | |
| Mexicánicos Reloaded | DSE | 58,000 | |
| Mexicánicos sin Fronteras | DSE | 95,000 | |
| Mexicánicos: Estado de México | DSE | 29,000 | |
| Mi Camino es Amarte | UNI | 1,753,000 | |
| Mi Famoso y Yo | UNI | 927,000 | |
| Mi Fortuna es Amarte | UNI | 1,825,000 | |
| Mi Querida Herencia | GV | 53,000 | |
| Michael Blackson Show, The | BET | 246,000 | |
| Michael Bublé Christmas | E! | 116,000 | |
| Michael Bublé's Christmas in the City | NBC | 2,342,000 | |
| Michael Strahan x Jon Bon Jovi: Halfway There | ABC | 2,716,000 | |
| Michelle Obama's Mission | CNN | 394,000 | |
| Michelle Obama: The Light We Carry | ABC | 2,805,000 | |
| Mickey 17 | HBO | 117,000 | |
| Mickey and Friends Trick or Treats | DSNY | 95,000 | |
| Mickey and Friends Trick or Treats | DJR | 111,000 | |
| Mickey and the Very Many Christmases | DJR | 129,000 | |
| Mickey Mouse Funhouse | DSNY | 177,000 | |
| Mickey Mouse Funhouse | DJR | 87,000 | |
| Mickey Saves Christmas | ABC | 1,348,000 | |
| Mickey Saves Christmas | DSNY | 56,000 | |
| Mickey Saves Christmas | DJR | 156,000 | |
| Mickey's Adventures in Wonderland | DJR | 112,000 | |
| Mickey's Tale of Two Witches | DSNY | 246,000 | |
| Middlemost Post | Nick | 109,000 | |
| Middlemost Post | NT | 50,000 | |
| Midsomer Murders | Ovation | 47,000 | |
| Midsommar | HBO | 83,000 | |
| Mightiest, The | SMTH | 53,000 | |
| Mighty Cruise Ships | SMTH | 161,000 | |
| Mike & Molly | N@N | 355,000 | |
| Mike & Molly | SYN | 2,618,000 | |
| Mike Tyson Mysteries | AS | 164,000 | |
| Milagros de Navidad | Universo | 22,000 | |
| Miley Cyrus: Endless Summer Vacation | ABC | 1,199,000 | |
| Miley's New Year's Eve Party | NBC | 5,314,000 | |
| MILF Manor | TLC | 187,000 | |
| Million Dollar Listing: Los Angeles | Bravo | 527,000 | |
| Million Dollar Wheels | TNT | 196,000 | |
| Million Little Things, A | ABC | 2,029,000 | |
| Milton Berle Show, The | NBC | 24,235,200 | |
| Minas de Pasión | UNI | 1,452,000 | |
| Mind Over Murder | HBO | 65,000 | |
| Minecraft Movie, A | HBO | 205,000 | |
| Mini Reni | MN | 182,000 | |
| Minions | Nick | 380,000 | |
| Minuto 45 | TUDN | 31,000 | |
| Minx | Starz | 33,000 | |
| Mira Quién Baila All Stars | UNI | 1,395,000 | |
| Mira Quién Baila ¡La Revancha! | UNI | 1,041,000 | |
| Mira, Royal Detective | DJR | 278,000 | |
| Miracle on 34th Street | FETV | 104,000 | |
| Miracle Workers | TBS | 374,000 | |
| Miraculous World, London: At the Edge of Time | DSNY | 132,000 | |
| Miraculous World: New York | DSNY | 95,000 | |
| Miraculous World: Paris | DSNY | 178,000 | |
| Miraculous World: Shanghai | DSNY | 71,000 | |
| Miraculous: Tales of Ladybug and Cat Noir | DSNY | 83,400 | |
| Miraculous: Tales of Ladybug and Cat Noir | DXD | 22,000 | |
| Mirada Policial | DSE | 60,000 | |
| Mirador Mundial | CNNE | 17,000 | |
| Miscellaneous Tournaments | Golf | 120,000 | |
| MisEducation of America, The | FNC | 1,018,000 | |
| Misión Europa | TUDN | 196,000 | |
| Miss Teen USA | CW | 470,000 | |
| Miss Universe Latina, el Reality | Universo | 62,000 | |
| Miss Universo | TEL | 2,610,000 | |
| Miss Universo | Universo | 67,000 | |
| Miss Universo: La Celebración | TEL | 1,456,000 | |
| Miss Universo: La Celebración | Universo | 41,000 | |
| Miss USA | CW | 582,000 | |
| Missing at Thanksgiving | ID | 223,000 | |
| Missing, Presumed Dead | NG | 50,000 | |
| Mission Foods NHRA Series | FOX | 673,000 | |
| Mission Shark Dome | DISC | 319,000 | |
| Mission Unexplained | SCI | 186,000 | |
| Mission Unstoppable | CBS | 884,000 | |
| Mission: Impossible - Dead Reckoning Part One | CBS | 1,542,000 | |
| Mission: Impossible - Rogue Nation | CBS | 2,899,000 | |
| Mistletoe Murders | HM | 989,000 | |
| Mixed Martial Arts | ESPN2 | 78,000 | |
| Miz & Mrs | USA | 540,000 | |
| MLB Afternoon Baseball Game | MLBN | 176,000 | |
| MLB ALCS Alt Cast | TRU | 212,000 | |
| MLB ALCS on Fox Deportes | FS1 | 94,000 | |
| MLB All-Star Celebrity Softball Game | MLBN | 105,000 | |
| MLB All-Star Game | FOXD | 127,000 | |
| MLB All-Star Game | NBC | 8,353,800 | |
| MLB All-Star Selection | ESPN | 246,000 | |
| MLB American League Championship Series | FS1 | 3,540,000 | |
| MLB American League Championship Series | TBS | 5,517,000 | |
| MLB American League Championship Series | TRU | 217,000 | |
| MLB American League Championship Series on FOX | FS1 | 2,756,000 | |
| MLB American League Championship Series on Fox Deportes | FOXD | 118,000 | |
| MLB American League Championship Series on Fox Deportes Pregame | FOXD | 103,000 | |
| MLB American League Championship Series on FOX Postgame | FS1 | 412,000 | |
| MLB American League Championship Series on FOX Pregame | FS1 | 273,000 | |
| MLB American League Championship Series Post Game | FS1 | 1,094,000 | |
| MLB American League Championship Series Pre Game | FS1 | 359,000 | |
| MLB American League Division Series | FOXD | 110,000 | |
| MLB American League Division Series | FS1 | 4,631,000 | |
| MLB American League Division Series | FS2 | 1,003,000 | |
| MLB American League Division Series | TBS | 3,471,000 | |
| MLB American League Division Series | TNT | 3,416,000 | |
| MLB American League Division Series | TRU | 350,000 | |
| MLB American League Division Series on FOX Postgame | FS1 | 77,000 | |
| MLB American League Division Series Postgame | FS1 | 1,228,000 | |
| MLB American League Division Series Pregame | FS1 | 1,494,000 | |
| MLB at Rickwood Field | FOX | 2,356,000 | |
| MLB at Rickwood Field Postgame | FOX | 1,966,000 | |
| MLB Baseball | FOXD | 32,000 | |
| MLB Big Inning | MLBN | 285,000 | |
| MLB Bonus Game | ESPN | 630,000 | |
| MLB Central | MLBN | 50,000 | |
| MLB Division Series | TBS | 4,557,000 | |
| MLB Division Series | TNT | 1,071,000 | |
| MLB Division Series | TRU | 905,000 | |
| MLB Division Series: Pre Game | FOXD | 128,000 | |
| MLB Draft | ESPN | 550,000 | |
| MLB Draft | MLBN | 226,000 | |