The Loop (TV)
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The following is a list of events, premieres, releases, cancellations, series endings, and other business ventures for Nickelodeon in 2021.
- January 25 - Deer Squad
- February 8 - Tooned In
- February 20 - Power Rangers Dino Fury
- March 4 - Kamp Koral: SpongeBob's Under Years (Paramount+)
- March 15 - Goldie's Oldies (international)
- March 20 - Drama Club
- April 2 - The Barbarian and the Troll
- Spring - Rugrats (Paramount+)
- September - Big Nate
- October - The Smurfs
- Fall - Warped!
- Star Trek: Prodigy (Paramount+)
- The Twisted Timeline of Sammy & Raj
- Erin & Aaron
- January 7 - Unfiltered, Season 2
- February 12 - Are You Afraid of the Dark?: Curse of the Shadows
- February 23 - ALVINNN!!! and the Chipmunks, Season 5
- March 5 - Peppa Pig, Season 9
- Summer - Hunter Street, Season 4
- Summer - Tyler Perry's Young Dylan, Season 2
- September - The Loud House, Season 6
- It's Pony, Season 2
- The Crystal Maze, Season 2
- America's Most Musical Family, Season 2
- Bubble Guppies, Season 6
- January 15 - The Astronauts, Season 1
- February 22 - ALVINNN!!! and the Chipmunks, Season 4
- March 6 - Tooned In, Season 1
- March 19 - Are You Afraid of the Dark?: Curse of the Shadows
- Ollie's Pack, Season 1
- It's Pony, Season 1
- Side Hustle, Season 1
- Blaze and the Monster Machines, Season 5
- Abby Hatcher, Season 2
- Danger Force, Season 1
- All That, Season 11
- The Loud House, Season 5
- The Casagrandes, Season 2
- Unfiltered, Season 2
- Bubble Guppies, Season 5
- January 10
- February 15 - The Loud House Mega Music Countdown
- March 13 - 2021 Kids' Choice Awards
- August 20 - PAW Patrol: The Movie
- March 4 - The SpongeBob Movie: Sponge on the Run (Paramount+ and Premium VOD)
- Rise of the Teenage Mutant Ninja Turtles: The Movie (Netflix)
- The Loud House Movie (Netflix)
- February 16 - Avatar: The Last Airbender: Toph Beifong's Metalbending Academy
- March 16 - The Loud House #12: The Case of the Stolen Drawers
- May 4 - The Casagrandes #1: We're All Familia
- June 1 - The Loud House Summer Special
- August 24 - The Loud House #13: Lucy Rolls the Dice
- November 30 - The Loud House #14: Guessing Games
- December 7 - The Loud House: Love Out Loud
- March 2 - Invader Zim: Best of GIR
- September 14 - Invader Zim: Volume 5
- November 9 - Invader Zim: Best of Skool
- April 16 - The Nickelodeon '90s: Cartoons, Game Shows and a Whole Bunch of Slime
- August 21 - Avatar: The Last Airbender: The Official Cookbook
- September 7
- Beware of Dogbot!
- The Rugrats' Bestest Joke Book
- The Rugrats Very, Very Hard Puzzle Book
- Teenage Mutant Ninja Turtles: Shredder's Revenge will be released on Steam and Nintendo Switch
Home video releases
- January 12 - SpongeBob SquarePants: The Complete Twelfth Season DVD
- February 2
- February 16 - Good Burger Blu-ray
- March 16
- May 18
- January 1 - The Haunted Hathaways is added to Netflix, and Good Burger premiered on Netflix again.
- January 12 - As Told by Ginger, Double Dare, Rank the Prank, Allegra's Window, Becca's Bunch, Blue's Room, The Fresh Beat Band, Gullah Gullah Island, Little Bear, Mutt & Stuff, Oobi, Oswald, Ricky Zoom, The Upside Down Show, and Zoofari are added to CBS All Access.
- January 15 - Henry Danger Seasons 1-3 are added to Netflix
- January 19 - Canticos and Ni Hao, Kai-Lan are added to CBS All Access.
- January 26 - Nacho Libre is added to CBS All Access.
- February 2 - Are You Afraid of the Dark? (2019), seasons 6-8 of Dora the Explorer, Wonder Pets! (although there were no episodes), and Imagine That are added to CBS All Access.
- February 8 - iCarly Seasons 1-2 are added to Netflix.
- February 9 - Instant Mom, Are You Afraid of the Dark? season 5 and Ryan's Mystery Playdate are added to CBS All Access (although the latter was later removed).
- March 1 - Charlotte's Web (2006) is added to HBO Max.
- March 2 - Hey Arnold!: The Movie is added again to CBS All Access.
- March 4
- March 23 - Eureeka's Castle, Double Dare (2018) (Although both of them had no episodes and were removed the next day), and Ryan's Mystery Playdate are added to Paramount+.
- March 24 - Seasons 2-4 of Aaahh!!! Real Monsters, The Bureau of Magical Things, Seasons 2-5 of Clarissa Explains It All, Digby Dragon, Frankie and Frank, Nickelodeon GUTS, Hey Dude, KaBlam!, Legends of the Hidden Temple, Nick Arcade, Seasons 2-3 of Paradise Run, Salute Your Shorts, SpongeBob DocuPants, Season 12 of SpongeBob SquarePants, Sunny Day, True Jackson, VP, Seasons 2-5 of The Wild Thornberrys, and You Can't Do That On Television are added to Paramount+.
- March 26 - Big Time Rush is added to Netflix.
- March 31 - Double Dare (2018) and SpongeBob As Told By are added to Paramount+.
- April 7 - Hunter Street and Rise of the Teenage Mutant Ninja Turtles are added to Paramount+.
- April 12 - Nicky, Ricky, Dicky & Dawn is added to Netflix.
- April 14 - Bunsen is a Beast, Eureeka's Castle (Although it had no episodes and was removed the next day), and Make It Pop are added to Paramount+.
- Rugrats (2021) will debut on Paramount+.
- Star Trek: Prodigy will debut on Paramount+.
- April 28 - Nick+ will launch in Japan.
- February 24 - Nickelodeon announces the launch of Avatar Studios.
- June 4 - Amazon.com discontinues all of its manufacture-on-demand DVDs and Blu-ray releases (including Nickelodeon's).
- January 4 - Tanya Roberts (voice actress on The Angry Beavers)
- January 23 - Larry King (contestant on BrainSurge)
- February 1 - Dustin Diamond (guest at the 1992 Kids' Choice Awards)
- March 9 - Isela Vega (actress on Dora and the Lost City of Gold)
- March 24 - George Segal (voice actor on Aaahh!!! Real Monsters)
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