For those who have enjoyed the NCIS series, one should start with the first season. The fourth season is a crucial turning point in character and plot development. The stories are fast-paced and exciting, but it's important to follow in chronological order. As an added plus, there are commentaries provided by cast and crew for those who like to hear about specific details on the filming, and there are "extras" including dinner table discussions by the show's stars.
What's great about it: Good package in terms of content and available extras