Like most family-based sitcoms, pretty much every episode has a self-contained story that involves some conflict that has to be resolved by the end of the episode. The twist that the series puts on it is that the show starts the story halfway to two-thirds of the way into the story, so the conflict or disaster has either happened or is ongoing, then tells, through flashbacks, what led up to the point where the episode starts. It was a fairly unique way of storytelling for sitcoms up to that point and kept it from being a cookie-cutter, carbon copy of what had come before.
The rest of the main cast included Kevin Corrigan as Sean's slacker brother, Richard Riehle as Sean's dad, and, Lynsey Bartilson, Jake Burbage, and Griffin Frazen, as the kids Lilly, Henry, and Jake. All the actors and actresses did a great job and had chances to steal scenes they were in. Lynsey Bartilson did a great job playing a moody teenage girl (with a great shriek when she got mad) who often scared the adults who had the responsibility to punish or lay down the law with her.
The DVD set is a four-disc set. The DVD release is bare-bones, with just the episodes and a handful of extras. The Mill Creek releases (which are not easy to find since they are out of print) are getting harder and harder to find at a reasonable price. They were put out years after the series ended as TV series releases on DVD were getting very scaled back, so you will not get commentaries, captions, or extremely in-depth behind-the-scenes material. That said, the extras included are still more than a lot of the sets are putting out these days (the end of 2019 as I write this), where many DVDs or, in the even rarer case, blu-ray releases just provide the episodes and nothing else. They include character profiles for Sean, Claudia, and Lilly, a chat with the show's creators, a short gag reel, and highlights from the first season episodes. Probably just over a half-hour's worth of material.
Overall, the show was very good, and a bit underrated. It is kind of shocking Fox kept it on the air as long as they did, given the network's reputation for giving shows a quick hook if they do not get great ratings immediately. While I do not think the show was ever a ratings monster, it was well-written and acted, and came across as a lot more "real life" than some family-centered sitcoms do. It also tackled subjects like sex, bullying, and even religion in a humorous yet respectful way, and is definitely worth a look. Just a note that it was filmed partially in front of a live audience and partially without, and does use laugh tracks for the parts that were not filmed live (much like The Big Bang Theory). So, if you are one of those people who absolutely hate laugh tracks in sitcoms, it is something to be aware of.