
Bartholomew Henry "Barry" Allen, also known by his alter ego The Flash, is a fictional character in The CW's Arrowverse franchise, first introduced in the 2013 episode "The Scientist" of the television series Arrow, and later starring in The Flash. The character is based on the DC Comics character of the same name, created by Robert Kanigher and Carmine Infantino and was adapted for television in 2013 by Greg Berlanti, Andrew Kreisberg and Geoff Johns. Barry Allen has been continually portrayed by Grant Gustin, with Logan Williams and Liam Hughes portraying younger versions.

Bartholomew Henry "Barry" Allen, also known as The Flash, is a fictional character in the DC Extended Universe. Based on the DC Comics superhero of the same name, he is portrayed by American actor Ezra Miller. The Flash makes his first cinematic appearance in Batman v Superman: Dawn of Justice before having a more prominent role in Justice League and its director's cut. Miller has also reprised the role in other DC Comics media such as the Arrowverse, and is currently slated to star in The Flash, an upcoming film based on the character. The DC Extended Universe marks the first time The Flash has been portrayed in live-action film.

Detective Stella Bonasera is a fictional character and a co-protagonist of the CBS crime drama CSI: NY. Portrayed by Melina Kanakaredes, Stella appeared in six seasons of CSI: NY, after which she was replaced by Jo Danville, played by Sela Ward.

Morgan Brody is a fictional character on the CBS crime drama CSI: Crime Scene Investigation, portrayed by Elisabeth Harnois. The character made her series debut during the season eleven episode "Cello and Goodbye", and departed the franchise in "Immortality", CSI's series finale.

Horatio Caine is a fictional character and the protagonist of the American crime drama CSI: Miami, portrayed by David Caruso from 2002 to 2012. He is the head of the crime lab, under the rank of Lieutenant of the MDPD.

Carlie Cooper is a fictional character appearing in American comic books published by Marvel Comics books. The character is named after Joe Quesada's daughter. She is friends with Peter Parker, Harry Osborn, Vin Gonzales, and Lily Hollister. She is one of Spider-Man's first potential romantic interests in the "One More Day" story arc and eventually is a girlfriend for a time.

Detective Josephine Danville is a fictional character and the co-protagonist of the CBS crime drama CSI: NY, portrayed by Sela Ward.

Megan Donner is a fictional character and one of two original protagonists of the CBS crime drama CSI: Miami. Portrayed by Kim Delaney, Donner appeared in the first ten episodes of the series. Megan was an MDPD Lieutenant and the Day Shift Assistant Supervisor of the Miami Dade Crime Lab. Prior to the series she was the Director of CSI.

Detective Calleigh Duquesne is a fictional character on the CBS crime drama CSI: Miami, portrayed by Emily Procter.

Julie "Finn" Finlay is a fictional character on the CBS crime drama CSI: Crime Scene Investigation, portrayed by Elisabeth Shue. She made her first appearance in the 14th episode of season 12, entitled "Seeing Red", and appeared in every episode during her four seasons as a series regular. She made her final appearance in the season 15 finale, "The End Game", before subsequently appearing in archive footage on CSI: Cyber's "Hack E.R."

The Flash is a fictional superhero appearing in a series of American comic books published by DC Comics. The character first appeared in Showcase #4, created by writer Robert Kanigher and penciler Carmine Infantino. Barry Allen is a reinvention of a previous character called the Flash.

Gilbert Arthur Grissom, Ph.D. is a fictional character portrayed by William Petersen on the CBS crime drama CSI: Crime Scene Investigation and its sequel, CSI: Vegas. Grissom is a forensic entomologist and, for the series' first nine seasons, a CSI Level III Supervisor employed by the Las Vegas Police Department. He appeared in 198 episodes of the original series, where he was succeeded by Raymond Langston and later D.B. Russell. Grissom will return in the CSI: Vegas sequel in 2021.

Jonathan "Jack" Stanley Hodgins IV, Ph.D. is a character in the American television series, Bones. He is portrayed by T. J. Thyne. Hodgins is introduced to the series primarily as an forensic entomologist, as well as a botanist, mineralogist, a forensic palynologist, and a forensic chemist; conspiracy theories are his hobby. During an investigation, he is primarily responsible for estimating time of death and examining trace evidence and particulates.

The Lady Cop is a fictional police officer, a comic book character published by DC Comics. She debuted in 1st Issue Special #4, and was created by Robert Kanigher and John Rosenberger.

Dr. Raymond Langston is a fictional character on the CBS crime drama CSI: Crime Scene Investigation, portrayed by Laurence Fishburne. He joined the show in season 9, after the departure of Gil Grissom, played by William Petersen. His last name is taken from Fishburne's son, Langston, who was named after the great African-American writer Langston Hughes.

Vincent "Vince" Masuka is a fictional character in the Showtime television series Dexter and the novels by Jeff Lindsay upon which the series is based. On television he is portrayed by Korean American C. S. Lee. Masuka is the Miami Metro Police lead forensic science investigator; he works alongside Dexter Morgan in the lab and at crime scenes. He often cracks tasteless and inappropriate jokes, invokes his Japanese heritage only when convenient, and harbors unrequited desire for Dexter's foster sister Debra. Although goofy and obsessed with sex, he is clever and very good at his job, causing Dexter to worry from time to time that Masuka will uncover his secret.

Dexter Morgan is a fictional character and the antihero protagonist of the Darling Dexter book series, written by Jeff Lindsay, as well as the television series of the same name, where he is portrayed by American actor Michael C. Hall, and by Devon Graye, Dominic Janes, and Maxwell Huckabee as a youth.

The Riddler is a fictional supervillain appearing in comic books published by DC Comics, created by Bill Finger and Dick Sprang. He first appeared in Detective Comics #140. The Riddler is commonly depicted as a criminal mastermind in Gotham City who takes delight in incorporating riddles and puzzles into his schemes, leaving them as clues for the authorities to solve. The Riddler is one of the most enduring enemies of the superhero Batman and belongs to the collective of adversaries that make up his rogues gallery.

Diebenkorn "D.B." Russell is a fictional character, portrayed by Ted Danson, from the CBS crime franchise CSI. Danson made his franchise debut in CSI: Crime Scene Investigation's season twelve episode "73 Seconds". He also starred as a series regular on the second season of CSI: Cyber.

Gregory Hojem Sanders is a fictional character on the CBS crime drama CSI: Crime Scene Investigation, portrayed by Eric Szmanda. Greg appeared in every episode, with the exception of "Crate 'n' Burial", "Blood Drops", "Fahrenheit 932", and "Too Tough To Die" from season one; "Cross Jurisdictions" from season two; "Paper or Plastic" from season four; "Hollywood Brass" from season five; "The Unusual Suspect" from season six; "Unleashed" from season eleven; and "Split Decisions" from season twelve.

Abigail "Abby" Sciuto is a fictional character from the NCIS television series on CBS Television, and is portrayed by Pauley Perrette. In a season 10 episode entitled "Hit and Run", a young Abby was played by Brighton Sharbino in flashbacks. Like Jethro Gibbs, Anthony DiNozzo, and Dr. Donald Mallard, Abby was introduced in the episodes "Ice Queen" and "Meltdown" of the television show JAG, and, up until May 2018, appeared in every episode of NCIS, in addition to being featured on the show's spin-offs, NCIS: Los Angeles and NCIS: New Orleans. The role made Perrette one of 2011's most popular actresses on U.S. primetime television, according to Q Score.

Dana Katherine Scully is a fictional character in the Fox science fiction-supernatural television series The X-Files, played by Gillian Anderson. Scully is an FBI agent and a medical doctor (M.D.), partnered with fellow Special Agent Fox Mulder for seasons one to seven and seasons ten and eleven, and with John Doggett in the eighth and ninth seasons. In the television series, they work out of a cramped basement office at FBI headquarters in Washington, D.C. to investigate unsolved cases labeled "X-Files". In 2002, Scully left government employment, and in 2008 she began working as a surgeon in Our Lady of Sorrows, a private Catholic hospital – where she stayed for seven years, until rejoining the FBI. In contrast to Mulder's credulous "believer" character, Scully is the skeptic for the first seven seasons, choosing to base her beliefs on what science can prove. She later on becomes a "believer" after Mulder's abduction at the end of season seven.

Sara Sidle is a fictional character portrayed by actress Jorja Fox on the CBS crime drama CSI: Crime Scene Investigation and its sequel, CSI: Vegas. Sidle is a forensic scientist and one of the core characters of the show, which revolves around a Crime Scene Investigation team in Clark County, Nevada, that investigates cases in and around Las Vegas. Fox appeared in both the first eight seasons and the final five seasons of the original show as a series regular. She also recurred throughout the ninth and tenth seasons of the series and headlined Immortality alongside Ted Danson. She will return in the sequel CSI: Vegas.

David Singh is a fictional character who appears in various DC Comics publications. He is Crime Lab Director for the Central City Police Department, who takes Barry Allen into his lab on Captain Frye's orders.

Patricia "Patty" Spivot is a fictional character who appears in various DC Comics publication and was created by writer Cary Bates and artist Irv Novick. She is a friend and partner of the second Flash, Barry Allen. She first appeared in "Five-Star Super-Hero Spectacular".

Detective Mac Taylor is a fictional character and the co-protagonist of the CBS crime drama CSI: NY. Portrayed by Gary Sinise, Mac is the Director of the NYPD Crime Lab and the Supervisor of the NYPD CSI team. Mac appeared in 200 episodes of the CSI franchise.

Dr John Evelyn Thorndyke is a fictional detective in a long series of 21 novels and 40 short stories by British author R. Austin Freeman (1862–1943). Thorndyke was described by his author as a 'medical jurispractitioner': originally a medical doctor, he turned to the bar and became one of the first — in modern parlance — forensic scientists. His solutions were based on his method of collecting all possible data and making inferences from them before looking at any of the protagonists and motives in the crimes. Freeman ensured that his methods were practical by conducting all experiments mentioned in the stories himself.

Catherine Willows is a fictional character, portrayed by Marg Helgenberger, from the CBS crime drama CSI: Crime Scene Investigation. Helgenberger made her franchise debut in the first season episode "Pilot". Helgenberger received several award nominations for her portrayal of Catherine, including two Primetime Emmy Award nominations and two Golden Globe Award nominations.

Dr. William "Will" Zimmerman is a main character and male lead of the Canadian fantasy-science fiction television series Sanctuary. He is portrayed by Robin Dunne. Will is introduced in the series as an FBI's Behavioral Analysis Unit forensic psychiatrist, who was recruited by Helen Magnus, head of the Sanctuary Network, to become her recent protégé.