Family Guy has delivered plenty of episodes with Quagmire at the center. These storylines saw the Griffin's neighbor really steal the show.

There's excellent news for cartoon fans as The Simpsons, Bob's Burgers, and Family Guy have all been renewed for further seasons (per NME). The news means that Family Guy will be fast approaching its 25th anniversary, and there's no end in sight for the Griffin family and the cast of colorful characters around them.

One character who will hopefully continue to see development over the show's upcoming seasons is Glenn Quagmire. The Griffin's neighbor started out as the perverted comic relief character during the early seasons. However, as time has passed, he has become just as essential as the Griffins themselves. There have been various episodes that see Quagmire as a Cat Cafe owner, running for mayor, and even pretending Brian is his dog to impress a girl. As a result, there have been plenty of times where Quagmire has stolen the show.

"The Cleveland-Loretta Quagmire" (Season 4, Episode 5)

Quagmire is a character that has matured over the years, but he used to be pretty awful. There have been a couple of instances where his actions would actually have drastic effects on his friends, but this was probably the worst.

This episode saw Quagmire and Cleveland's ex-wife, Loretta as they attempt to hide that they are having an affair, but are soon discovered by Peter and Brian. Keep in mind, this was back when Cleveland was a bland character who hadn't been fleshed out much, so this incident was a character-defining moment for both of them.

"I Take Thee, Quagmire" (Season 4, Episode 21)

Quagmire may date a lot of women, but he was never one for true commitment. This episode sees Quagmire as he falls in love with and marries Peter's maid only to immediately regret it, causing him and the guys to concoct a scheme to fake his death.

This episode is notable for being the first time Quagmire develops legitimate feelings for someone. He has since become more fleshed out as a character and has had various serious relationships, but this was the episode that made viewers realize he is more than the sexually driven character he has been portrayed as before this.

"Meet The Quagmires" (Season 5, Episode 18)

Listed as the best episode of Family Guy season 5, "Meet The Quagmires" was the episode that showed just how long Quagmire has been infatuated with Lois. When Peter makes the mistake of going back in time to be 18 again, he causes a ripple effect that leads to Quagmire and Lois getting together.

Since this episode, fans have been treated to more information that reveals the depth of Quagmire's crush on Lois, but this episode shows a scenario where they actually could have gotten married. Obviously, this episode has no drastic repercussions on the character's history, but it still serves as a fun what-if scenario with Quagmire at the center.

"Quagmire's Baby" (Season 8, Episode 6)

When Quagmire finds a baby with a note left at his front door, he discovers that the child belongs to someone he had slept with in the past. Feeling like he was unable to raise her on his own, Quagmire puts the child up for adoption.

Since this episode, there have been moments that focus on Quagmire's softer side, but this was the first time viewers got to see him take on the role of a single father. He may have decided to put the child up for adoption, but the episode still shows that he is an honest and loyal man who one day could be a great father.

"Quagmire's Dad" (Season 8, Episode 18)

When Quagmire's father comes to visit, Peter and Joe express that they believe Quagmire's father could gay. He is mortified to discover that his intent for the trip was to get a sex change, and hopes that Quagmire can support her. It takes a while, but Quagmire eventually accepts his father's choice.

Dan Quagmire (now Ida Davis) has made many notable appearances since this season 8 episode, and she is even one of Brian's past girlfriends. This episode is notable because Quagmire was able to put aside his memories of his father and accept this change.

"Tiegs For Two" (Season 9, Episode 14)

When Quagmire holds a class for getting with women, Brian decides to join thinking he will find love but discovers the class is only for cheap hook-ups, leading him to use these tactics on Cheryl Tiegs out of spite.

Quagmire retaliates by doing the same to Brian's former girlfriend and one of Brian's most questionable dating choices, Jillian. Eventually, both girls leave the guys when they see they are being used.

"Meg And Quagmire" (Season 10, Episode 10)

In this bizarre season 10 episode, Meg Griffin turns 18, which is basically just a green light for Quagmire. When Peter discovers Quagmire's intentions, he and Lois aim to end their relationship.

This episode isn't integral to the overall story, but it still is an entertaining one. Quagmire has spent years making jokes about the day Meg turns 18, and this episode shows viewers just that. Luckily, Peter and Lois realize how weird their relationship is and stop them before they could do anything at Quagmire's remote cabin.

"Quagmire's Mom" (Season 13, Episode 10)

Quagmire has mentioned his mother in past seasons, but little was known about her until this season 13 episode. When Peter throws a party, Quagmire brings a girl and eventually sleeps with her, but soon discovers the girl was still in high school (a possible reason he is seen as one of Family Guy's most hated characters).

During his trial, Quagmire expresses that he blames his mother's active sex life when he was growing up, leading her to reveal that she has committed to Christianity and aims to prove Quagmire's innocence. Nothing really happens in the end, and the conclusion is Family Guy's typical lack of repercussions for Quagmire's actions.

"Candy, Quahog, Marshmallow" (Season 14, Episode 10)

In this episode, when Peter and the guys are looking through old boxes at Quagmire's, they uncover old videotapes of Quagmire during his time as a Korean soap opera star. Once they all watch the tapes, they realize the show's final episode is missing, naturally making them unanimously decide to take a trip to Korea to find it.

Once they arrive, they almost immediately run into his former co-star, Sujin, who reveals she has the last tape. Upon watching it and reminiscing about the past, Quagmire decides to stay (until the guys sing "Candy, Quahog, Marshmallow"). This episode serves as another reminder that Quagmire has had a storied past, making him one of the show's most interesting characters.

"American Gigg-olo" (Season 15, Episode 3)

Every once in a while, the Family Guy writer's room decides to write an episode highlighting Quagmire as a pilot to make him seem like a more upstanding citizen. In this season 15 episode, Quagmire and other pilots go on strike.

When Quagmire decides to take a break from his protests, he wanders into a bar where a bachelorette party is being held, where they mistake him as a stripper. He decides to play along, realizing that it's right up his alley. This episode isn't necessarily important, but it is still one that reminds fans, "who else but Quagmire?"

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