Young Sheldon is the prequel series to the popular comedy series The Big Bang Theory (BBT), set around the character of Sheldon Cooper (played by Jim Parsons in the parent series) as a child. It aired for seven seasons from 2017 to 2024. Most of the series is set in the late 1980s to early 1990s, starting with Sheldon starting high school at the age of nine and ending when he goes to college at Caltech at the age of fifteen. The show stars Ian Armitage as the titular young Sheldon, Raegan Revord as Sheldon's twin sister, Missy, Montana Jordan as Sheldon's older brother George Jr./Georgie, Annie Potts as Sheldon's grandmother, Connie (who everyone calls Meemaw), Lance Barber as Sheldon's father, George Sr., and Zoe Perry as Sheldon's mother, Mary. Jim Parsons narrates the series (and appears live in the final episode) in the guise of writing his memoir.
The casting choices of Barber and Perry are interesting. In BBT, Barber played a minor character as Leonard's high-school bully. Perry is the real-life daughter of Laurie Metcalf, who played the older version of Mary in BBT. Thus, Perry looked and sounded very much like a younger version of the character her mother played. Unfortunately, the writers missed a golden opportunity to joke about Sheldon's dad looking exactly like his roommate's high school bully. Emily Osment joined the cast as a recurring character in season five and was promoted to a series regular for the final two seasons. The show also has a strong supporting, guest, and recurring cast, including Matt Hobby, Wyatt McClure, Wallace Shawn, McKenna Grace, Melissa Peterman, Wendie Malick, Sarah Baker, Reba McEntire, Brian Stepanek, Rex Linn, Ryan Phuong, Craig T. Nelson, Jason Alexander, Richard Kind, Ed. Begley Jr., Doc Farrow, David Hasselhoff, and Robert Picardo. Some members of the BBT cast also appear in voice roles. Kaley Cuoco voices a swimming pool in Sheldon's nightmare, Simon Helberg voices his character Howard from the BBT, and Mayim Bialik voices her character Amy in a couple of Sheldon's narrations. Bialik also appears live in the series finale along with Parsons.
The Blu-Ray set is a 14-disc set with two discs per season. It comes in a large keep case and an outer slipcover. The discs are held in tabs that can be difficult to remove the discs from at times, and at other times the discs fall off them. Some seasons include bonus features such as behind-the-scenes material featuring interviews with cast and crew members. A couple of the seasons do not have any bonus content. The A/V quality of the Blu-ray discs is excellent. Although the series does not rely much on special effects, it looks and sounds great in HD. The content of the discs is the same as the single-season releases, so you do not get anything different if you already have those.
The series is very different from BBT. Where BBT is a straight sitcom filmed in front of an audience and uses a laugh track, Young Sheldon is filmed more like a movie and includes much more drama in the storylines than the parent series did. I would say the series looks and feels more like The Wonder Years than it does BBT. While the character of Sheldon is the focus of the series, especially early on, because of the time frame it is set in, it can focus on the other characters. While all the actors do a great job with their characters, Potts and Revord are great early in the series, stealing nearly every scene they are in. Throughout the series, the character of Georgie probably changes the most, and Montana Jordan does a fantastic job as the series goes along.
Several easter eggs in the series refer to or connect with things from BBT, such as the origin of Bazinga, why Sheldon uses the word coitus, and how he came up with the three-knocks routine. And, for those who were kids in the 80s and 90s, there are some great blasts from the past. The writers also retcon and/or add context to some elements of Sheldon's past referred to in BBT, the largest being Sheldon's reference to seeing his father kissing another woman. The series is well-written and very well-acted. Armitage and Perry did an excellent job making their characters (the two characters seen most in BBT) their own without copying everything Jim Parsons and Laurie Metcalf did. Lance Barber was wonderful as a charming, caring, and tough father who struggles to understand Sheldon, struggles to connect with Missy, and wants more for Georgie. While you do not need to have seen BBT to follow what is going on in Young Sheldon, it does help to have watched BBT first. It is worth noting that Parson's narrations reveal things that happened to Sheldon after BBT ended, which may spoil that series for people watching Young Sheldon first. Ultimately, if you liked or loved BBT, this is a must-watch. If you just like period shows or wholesome family shows, regardless of whether you liked or even watched BBT, this is also worth watching.