What makes a TV show last for decades? Is it the beloved characters, the clever writing, or maybe just good timing and a bit of luck? For TV lovers, there’s something truly special about series that break records and stick around for generations. While plenty of shows disappear after just one or two seasons, a handful have stood the test of time, becoming cultural landmarks. From animated comedies to sci-fi adventures, crime dramas, and soaps, the success of these iconic series comes with fascinating behind-the-scenes stories. Join us as we explore the histories, cultural impacts, and untold tales of TV’s most enduring classics.

The Simpsons

Debuting on December 17, 1989, The Simpsons has reigned as one of the most recognized and beloved television shows in history. Now in its 36th season, this quirky animated sitcom hilariously chronicles the lives of the Simpson family and their fellow Springfield residents. But did you know The Simpsons started as a series of short segments on The Tracey Ullman Show? Matt Groening, the creator, never imagined his crudely drawn characters would go on to define a generation.

One reason for the longevity of The Simpsons is its uncanny ability to both riff on and reflect social and political issues of the times. It introduced the concept of a prime-time animated show for adults, influencing other hits like Family Guy and Rick and Morty. The show keeps fans buzzing with its eerie "predictions," like foreseeing Donald Trump’s presidency years before it happened.

Behind the scenes, disputes over voice actor pay almost caused production to halt in 1998. Thankfully, the issue was resolved, allowing stars like Dan Castellaneta (Homer) and Nancy Cartwright (Bart) to continue shaping these iconic characters.

Law & Order

The sound of dun-dun! has become synonymous with crime TV thanks to Law & Order. Created by Dick Wolf, it premiered in 1990 and introduced a fresh, two-part format. The first half of each episode focused on the police investigating a crime, while the second showed the legal system at work in the courtroom. This formula proved so popular that the show lasted 20 seasons, officially ending in 2010.

What made Law & Order groundbreaking was its ability to draw storylines "ripped from the headlines." By loosely adapting real-life scandals and court cases, the series felt both timely and compelling. It also launched a sprawling franchise, including the immensely successful Law & Order: Special Victims Unit.

The show featured a revolving door of stellar cast members, such as Sam Waterston, Jerry Orbach, and Mariska Hargitay. Fun fact? Many now-famous actors, including Jennifer Garner and Idris Elba, made guest appearances on the show early in their careers.

Doctor Who

A two-hearted alien who can travel through time and space? That’s Doctor Who in a nutshell. This British sci-fi masterpiece first aired on November 23, 1963, and has become a cultural treasure. After the original series ended in 1989, fans worried Doctor Who might be gone forever. But in 2005, the show was revived, breathing new life into the franchise and introducing it to an entirely new generation.

One genius aspect of Doctor Who is the concept of regeneration. When the Doctor "dies," they transform into a new body with a new personality, allowing different actors to take on the iconic role. Stars like David Tennant, Matt Smith, and Jodie Whittaker (the first female Doctor) have each brought their unique spin to the character.

The show blends thrilling adventures with meaningful stories about kindness, curiosity, and hope. Whether the Doctor is battling Daleks or meeting historical figures like Shakespeare, every episode feels like a fresh, imaginative ride.

The Tonight Show

The modern late-night show owes everything to The Tonight Show. First airing in 1954, it quickly became a TV institution. Steve Allen was the first host, but Johnny Carson’s 30-year tenure, beginning in 1962, cemented the show's place in history. Carson’s wit and charm set the standard for future hosts like Jay Leno and today’s Jimmy Fallon.

The Tonight Show has always been a prime spot for comedians, actors, and musicians. Carson’s monologues became legendary. Fallon has added viral games and celebrity skits. Over seven decades, the show has managed to adapt to changing tastes and maintain its status as television’s go-to evening event.

Coronation Street

Over in the UK, Coronation Street has been captivating audiences since December 9, 1960. The show, lovingly called "Corrie," chronicles the ups and downs of residents living on a working-class street in Manchester. With its focus on relatable characters and community drama, it has become a staple of British television and holds the Guinness World Record for the longest-running soap opera.

The magic of Coronation Street lies in its ability to tackle both everyday life and major social issues. It’s not afraid to tackle tough subjects, from domestic abuse to mental health struggles, while still delivering plenty of humor. With over 10,000 episodes under its belt, "Corrie" continues to attract loyal viewers.

Sesame Street

Since its debut on November 10, 1969, Sesame Street has revolutionized children’s television. Combining humor, music, and beloved characters like Big Bird, Elmo, and Cookie Monster, the show is both fun and educational. Designed to prepare children for school, the show tackles everything from basic math to complex issues like racism and grief.

One of Sesame Street’s biggest accomplishments has been its commitment to inclusivity. It was among the first children’s shows to feature a racially diverse cast, and its messages of kindness and understanding resonate with audiences around the globe. Decades later, Sesame Street continues to teach and inspire children everywhere.

Days of Our Lives

"So like sands through the hourglass, so are the Days of Our Lives." This iconic opening line has been inviting viewers into the world of Salem since the show’s debut on November 8, 1965. Known for over-the-top romance, betrayals, and shocking twists, Days of Our Lives has become synonymous with American soap operas.

The show gained a reputation for pushing boundaries, featuring storyline firsts like interracial relationships and supernatural elements (yes, Marlena’s possession!). It’s also launched the careers of stars like Jensen Ackles and Alison Sweeney. Though daytime soaps have dwindled, Days keeps churning out drama five days a week, ensuring fans always have something to talk about.

Honorable Mentions

These shows have made history, but there are plenty of others worth celebrating. Western drama Gunsmoke aired for 20 years and set a high bar for character-driven storytelling. Saturday night comedy institution Saturday Night Live, which debuted in 1975, continues to make waves with its sketches and star-making performances. And of course, Grey’s Anatomy has kept viewers on the edge of their seats since 2005, blending emotional drama with heart-pounding medical emergencies.

The shows that endure have adaptability, strong characters, and a willingness to take creative risks. Lucky timing also plays a role. Sometimes, a show just hits its stride at the right moment, capturing something in the cultural zeitgeist and securing its legacy.