In Episode One "The Magnificent Seven", holding his hand out for cash like the rest of his adopted family.
In Episode Two "
In Episode Three, "Every Bundy Has a Birthday." It is revealed that Seven does not know when his birthday is, so Peggy decides that they should celebrate it on Al's birthday instead. They take him to a local park and after standing up for Al and the rest of the family, Al declares Seven an official Bundy.
In Episode Four, "Al on the Rocks,"
In Episode Fourteen, "It doesn't get any better than this." The Bundy's and Marcy leave to go on a fishing vacation, leaving Seven to be looked after by Bud and Kelly, who annoys them, but they quickly shut him up by throwing a blanket over him and he goes to sleep.
In Episode Eighteen, "Peggy And the Pirates," Seven listens to a story told by Peggy featuring pirates including Steve Rhoades.
Zemus Wanker - Zemus is Seven's biological father
Ida Mae Wanker - Ida Mae is Seven's biological mother.
Peggy Bundy - Peggy is Seven's first cousin and later on informal adopted mother. Unlike her other children, she favours Seven and spoils him and treats him like her own son.
Al Bundy - Al is hesitant to look after Seven as he was another mouth to feed. He then goes looking for Seven's parents and however upon his return, he lies to Peggy and the rest of the Bundy's that he didn't find them
Kelly Bundy -
Bud Bundy -
Peggy's cousins Zemus Wanker and Ida Mae Wanker (played by Bobcat Goldthwait and Linda Blair) drop off their son and leave him behind for the Bundys to take care of. He appeared on the seventh season of Married with Children in a handful of episodes, then disappeared without any explanation other than a quick mention by the D'Arcys that he showed up in their house and won't leave. They claim they want to rename him, and possibly begin taking care of him, but that's the last time he is referred to.
He was an extremely unpopular character with the fans. However, in season eight, in the episode "Kelly Knows Something", Kelly is studying for a trivia show. As she learns new information, you visually see her forgetting other things. One thing that "pops out of her head" is an image of Seven. There is a scene where a carton of milk is held up at the Bundy's breakfast table and a picture of Seven is shown on the carton under the heading "Missing" but the Bundys don't seem to notice, or care. The milk carton with the picture of Seven under the "Missing" heading was also prominently featured in the epsisode "Ride Scare".
For a large number of fans, the introduction of Seven was where the series, at the very least, came perilously close to "jumping the shark", a reference to a Happy Days episode where that activity happened and subsequent episodes went downhill. Seven also represented other TV tropes, such as "Cousin Oliver", referencing a Brady Bunch concept where a younger, cuter character appears with little backstory in order to boost ratings, as well as "Chuck Cunningham Syndrome", another Happy Days reference where a main cast character disappears from the show with no explanation whatsoever.
Seven was played by former child actor turned grown-up actor Shane Sweet.