As of 2021, there are several TV series that have amassed a significant number of episodes, with some shows even surpassing the 300-episode mark. The number of episodes a show has can be an important factor in its longevity and popularity, as it provides viewers with more content and opportunities to engage with the characters and storylines. In this article, we'll take a look at some of the TV series that have the most episodes as of 2021.

One of the TV series with the most episodes is the long-running animated sitcom "The Simpsons." Created by Matt Groening, "The Simpsons" premiered in 1989 and has since become one of the most iconic and beloved TV shows of all time. As of 2021, the show has aired 694 episodes over the course of 32 seasons. "The Simpsons" has become known for its satirical humor, pop culture references, and memorable characters, including the titular family, Homer, Marge, Bart, Lisa, and Maggie. The show has also spawned numerous merchandise, video games, and even a feature film.

Another TV series with a substantial number of episodes is the medical drama "Grey's Anatomy." Created by Shonda Rhimes, "Grey's Anatomy" premiered in 2005 and has since aired 17 seasons, with a total of 380 episodes as of 2021. The show follows the personal and professional lives of the doctors at Grey Sloan Memorial Hospital, and has become known for its emotional storylines, diverse cast, and iconic moments. "Grey's Anatomy" has also spawned multiple spin-offs, including "Private Practice" and "Station 19."

One of the longest-running TV series of all time is the British science fiction show "Doctor Who." First premiering in 1963, "Doctor Who" has aired 38 seasons and 862 episodes as of 2021. The show follows the adventures of the Doctor, a time-traveling alien who travels through time and space in a spaceship called the TARDIS. "Doctor Who" has become known for its unique storytelling, iconic villains, and the ability to reinvent itself with each new Doctor. The show has also spawned multiple spin-offs, including "Torchwood" and "The Sarah Jane Adventures."

Another TV series with a substantial number of episodes is the police procedural "Law & Order: Special Victims Unit." Premiering in 1999, "SVU" has aired 22 seasons and 491 episodes as of 2021. The show follows the detectives of the NYPD's Special Victims Unit as they investigate crimes of a sexual nature. "SVU" has become known for its powerful performances, gripping storylines, and addressing important social issues. The show has also spawned multiple spin-offs, including "Law & Order: Criminal Intent" and "Law & Order: Organized Crime."

One of the most successful sitcoms of all time is "Friends," which aired from 1994 to 2004. The show follows a group of six friends living in New York City, and has become known for its iconic catchphrases, memorable guest stars, and relatable storylines. As of 2021, "Friends" has a total of 236 episodes across 10 seasons. The show has remained popular even after its conclusion, and has been praised for its impact on popular culture and representation of friendship.

Another TV series with a significant number of episodes is the crime drama "NCIS." Premiering in 2003, "NCIS" follows the Naval Criminal Investigative Service as they solve crimes involving members of the United States Navy and Marine Corps. As of 2021, the show has aired 18 seasons and 424 episodes. "NCIS" has become known for its strong ensemble cast, action-packed storylines, and addressing important social issues. The show has also spawned multiple spin-offs, including "NCIS: Los Angeles" and "NCIS: New Orleans."

As of 2021, there are several TV series with a significant number of episodes, ranging from animated sitcoms to crime dramas. These shows have become beloved by audiences for their unique storytelling, iconic characters, and ability to address important social issues. Whether you're a fan of "The Simpsons," "Grey's Anatomy," "Doctor Who," "Law & Order: SVU," "Friends," or "NCIS," there's no denying that these shows have left a lasting impact on popular culture and will continue to entertain audiences for years to come.