The 'Jedi fortune cookie' message that opens the show reads "You hold onto friends by keeping your heart a little softer than your head."
Thang Le designed the storm-covered moon of Ruusan to be the opposite of the calm and serene gas-planet Bespin. He based the atmosphere on Jupiter's stormy environment.
The Aqualish (Walrus Man) technician first appeared sitting at a bar in Ziro the Hutt's palace in Star Wars: The Clone Wars (2008) and makes several appearances throughout the Clone Wars TV series. According to the 'Ultimate Battles Visual Guide' book, his name is Pune Zingat.
The Aurebesh text that Captain Rex points to on his view screen translates to 'Zoom in Skytop Station'
"Duel of the Droids" and "Downfall of a Droid" were the first two installments of the show created at Lucasfilm Animation Singapore. Rob Coleman, who served as Animation Director for the CGI characters in the prequel trilogy, was asked to shepherd them along, and was happy to do so. However, he does admit that because they were the first installments, they turned out a bit rougher than those that followed.