"Stargate SG-1" ended after its tenth season due to a combination of factors, including declining viewership, rising production costs, and changes in network priorities. The series, which was originally popular on Showtime and later on Sci-Fi Channel, faced competition from other shows and a shift in audience interests. Although the show concluded with a two-part finale, it left some story arcs unresolved. The franchise continued with the direct-to-DVD movies "Stargate: The Ark of Truth" and "Stargate: Continuum," which aimed to wrap up lingering plotlines.

"Stargate SG-1" is widely regarded as a good show, praised for its engaging storytelling, character development, and imaginative exploration of science fiction themes. The series, a spin-off of the 1994 film "Stargate," follows a team that uses a network of ancient alien devices to explore other planets. It blends action, adventure, and humor, appealing to both sci-fi fans and general audiences. With ten seasons and a dedicated fanbase, it has received critical acclaim and remains influential in the genre.

Richard Dean Anderson decided to leave "Stargate SG-1" primarily due to a desire to spend more time with his family and pursue other interests. After eight seasons, he felt it was time to step back from the demanding filming schedule. Although he continued to make guest appearances in later seasons and contributed to the franchise, his departure allowed him to focus on personal projects and enjoy a more balanced lifestyle. Anderson's role as Jack O'Neill became iconic, and he remains a beloved figure in the "Stargate" community.

To watch "Stargate SG-1" and "Stargate Atlantis" in chronological order, start with "Stargate SG-1," which aired from 1997 to 2007. Watch all ten seasons of SG-1 first. After finishing SG-1, proceed to "Stargate Atlantis," which aired from 2004 to 2009. Atlantis is set in the same universe and features crossover episodes with SG-1, particularly in its later seasons, enhancing the viewing experience. If you want to include the movies, watch "Stargate: The Ark of Truth" and "Stargate: Continuum" after completing SG-1.