This story precedes season one's Rookies (2008) as it depicts the members of Domino Squad before they were stationed at Rishi Base.
The name of one of the tests Domino Squad runs is "THX 1138" which is the name of another George Lucas' film, THX 1138 (1971).
The 'Jedi fortune cookie' message that opens the show reads "Brothers in arms are brothers for life."
Depicts Echo's training squadron, Domino Squad, who are referred to as a "bad batch" of clones, as well as a defective clone called "99," who is assigned to maintenance rather than combat. In season 7, Echo would join Clone Force 99, a squad made up entirely of defective clones, who would be the focus of the spin-off series Star Wars: The Bad Batch (2021).
First series appearance of Shaak Ti.