1,162 articles
Jimmy McNulty
Jimmy McNulty (James "Jimmy" McNulty) is the fictional Baltimore police detective played by Dominic West in HBO's The Wire, whose insubordinate pursuit of the Barksdale case drives the series.
Jimmy Neutron
Jimmy Neutron (James Isaac Neutron) is the boy-genius inventor of Nickelodeon's CGI franchise: the 2001 film Jimmy Neutron: Boy Genius, the 2002–2006 series The Adventures of Jimmy Neutron, and Planet Sheen, set in Retroville with robot dog Goddard.
Jimmy Neutron (franchise)
Jimmy Neutron franchise: American CGI animated property from Nickelodeon, beginning with the 2001 film Jimmy Neutron: Boy Genius (John A. Davis, DNA Productions), followed by the 2002-2006 TV series, Jimmy Timmy Power Hour crossovers, Planet Sheen, and games.
Jo Wilson (Grey's Anatomy)
Jo Wilson (birth name Brooke Stadler; also Jo Karev) is a fictional OB/GYN surgeon on Grey's Anatomy, played by Camilla Luddington since the season 9 premiere, known for her abuse-survivor arc and 250+ episodes.
Joan Ferguson (Wentworth)
Joan Ferguson, nicknamed The Freak, is the fictional main antagonist of the Australian prison drama Wentworth, played by Pamela Rabe; a reimagining of Maggie Kirkpatrick's Prisoner character, she is Governor, inmate, escapee, and amnesiac returnee.
Joey Potter
Joey Potter, full name Josephine "Joey" Potter, is the Katie Holmes-played lead female character of Dawson's Creek (WB, 1998-2003), a Capeside teen defined by her dead mother, imprisoned father, and the Dawson-Pacey love triangle.
Joey Quinn
Joey Quinn is a fictional character in the TV series Dexter, played by Desmond Harrington, a Miami Metro detective introduced in season 3 as Debra Morgan's partner.
John Carter (ER)
Noah Wyle portrayed John Truman Carter III, a fictional doctor in the NBC series ER. He grew from a third-year student into a confident and skilled attending physician.
John Locke (Lost)
John Locke is a fictional character on ABC's Lost (2004-2010), played by Terry O'Quinn; a paralyzed man healed on the island, the show's man of faith opposite Jack Shephard, later impersonated by the Man in Black.
John Munch
John Munch is a fictional detective played by Richard Belzer, debuting on Homicide: Life on the Street (1993) and later Law & Order: SVU, based on Baltimore detective Jay Landsman and played across 10 TV series until 2016.
John Winchester (Supernatural)
John Eric Winchester is the father of Sam and Dean in Supernatural (2005–2020), played by Jeffrey Dean Morgan; a Marine-turned-hunter who trades his soul to Azazel, distinct from The Winchesters prequel version.
Johnlock
Johnlock is the fandom ship name (John + Sherlock) for a romantic pairing of John Watson and Sherlock Holmes in BBC's Sherlock; the fandom's most popular ship, center of the TJLC theory and queerbaiting debate.
Johnny Quick (Crime Syndicate)
Johnny Quick is the evil Flash counterpart of DC Comics' Crime Syndicate, debuting in Justice League of America #29 (1964) on Earth-Three. Versions include the Speed Juice-addicted antimatter Quick, New 52 Jonathan Allen, and Infinite Frontier Jonathan Chambers.
Joker (character)
The Joker (Curingón; Guasón) is DC Comics' supervillain arch-enemy of Batman, created by Finger, Kane, and Robinson, debuting in Batman #1 (April 25, 1940), with the Red Hood chemical-vat origin, the multiple-choice past of The Killing Joke, and screen portrayals by Romero, Nicholson, Ledger, Leto, and Phoenix.
Joo Ho-jin (주호진)
Joo Ho-jin (주호진) is a fictional character, born 1991 in-show, and main protagonist of Netflix's 2026 rom-com Can This Love Be Translated? (이 사랑 통역 되나요?). A multilingual interpreter played by Kim Seon-ho, he interprets for actress Cha Mu-hee (Go Youn-jung) on the dating show Romantic Trip.
Jordan Li
Jordan Li is a bigender, non-binary superhero in Gen V, The Boys spinoff, played by London Thor and Derek Luh; the male form is indestructible, the female form fires energy blasts.
Josh Lyman
Josh Lyman (Joshua Lyman) is the fictional Deputy White House Chief of Staff on The West Wing, played by Bradley Whitford in 150 episodes, later Matt Santos's campaign manager and Chief of Staff.
Joyce Summers
Joyce Summers is the mother of Buffy and Dawn Summers in Buffy the Vampire Slayer, an art gallery manager played by Kristine Sutherland in 58 episodes across every season; she dies of a brain aneurysm in "The Body".
Jules Vaughn
Jules Vaughn is a main character in HBO's Euphoria, portrayed by Hunter Schafer in her screen debut; a trans teen who transitioned at 13, central to the Rue romance and the special episode co-written by Schafer.
Juliet Burke
Juliet Burke is a fictional character on ABC's Lost (2004-2010), played by Elizabeth Mitchell from Season 3. A Miami fertility doctor recruited by Mittelos Bioscience to the Others' island, she is known for shifting loyalties, the Sawyer romance in the 1970s Dharma storyline, and her Season 5 death detonating a bomb.
Juliette Barnes
Juliette Barnes (Juliette Jolene Barnes-Barkley), fictional country-pop star and co-lead of the drama Nashville (2012–2018), played by Hayden Panettiere; Rayna Jaymes's young rival, two Golden Globe nominations, harassment and postpartum storylines.
Kana: Little Sister
Kana: Little Sister (加奈 ～いもうと～, Kana ~Imouto~) is a 1999 Japanese adult visual novel by D.O., translated by G-Collections in 2002. It follows Taka and his kidney-diseased sister through six endings across normal and intellectual routes.
Kanan Jarrus
Kanan Jarrus, born Caleb Dume, is the fictional Jedi Knight of Star Wars Rebels (2014), voiced by Freddie Prinze Jr. A Padawan of Depa Billaba who survived Order 66, he trained Ezra Bridger, was blinded by Maul, and died in 1 BBY saving the Ghost crew.
Kang Sae-byeok (강새벽)
Kang Sae-byeok (강새벽), Player 067 in Squid Game, is a North Korean defector played by Jung Ho-yeon; she entered the game to reunite her family and remains central to the finale through Gi-hun's vision and her brother Cheol's reunion.
Kara Thrace
Kara "Starbuck" Thrace, fictional Viper pilot in Battlestar Galactica (2003-2009), played by Katee Sackhoff; gender-swapped from Dirk Benedict's original, dies in "Maelstrom", returns, vanishes in "Daybreak, Part II".
Katara (Avatar: The Last Airbender)
Katara is the Southern Water Tribe waterbender in Avatar: The Last Airbender who frees Aang from the iceberg, trains under Master Pakku, learns bloodbending from Hama, and later leads its outlawing; played by Kiawentiio in Netflix's live-action series.
Kate Austen
Kate Austen, full name Katherine Anne Austen, is a fictional character on the ABC series Lost, played by Evangeline Lilly across all six seasons from 2004 to 2010.
Kate Beckett
Kate Beckett (Katherine Beckett) is the fictional NYPD homicide detective played by Stana Katic in ABC's Castle (2009-2016), partnered with novelist Richard Castle, inspiration for the Nikki Heat novels, driven by her mother's unsolved murder.
Kate Lethbridge-Stewart
Kate Lethbridge-Stewart (Kate Stewart), Doctor Who character, UNIT commander-in-chief and daughter of the Brigadier, played by Jemma Redgrave; TV debut The Power of Three (2012), after 1995's Downtime; motto "Science leads".
Kate Lockley
Kate Lockley, Joss Whedon's LAPD detective in the TV series Angel, played by Elisabeth Röhm; debuts in Lonely Hearts, 15 episodes through Epiphany, later in Angel comics.