Kanan refers to Zeb as a 'rare, hairless Wookiee'. Zeb is based on early concept art for Chewbacca by Ralph McQuarrie.
James Arnold Taylor stated on his YouTube channel that he used a slightly different voice for Obi-Wan Kenobi's cameo: instead of his usual rendition, which he has described as a blend of Ewan McGregor and Alec Guinness, he did a more straightforward impression of McGregor's performance in the live-action films.
First on-screen appearance of the planet Kessel and its spice mines, first mentioned by C-3PO in Star Wars: Episode IV - A New Hope (1977).
The hazard label on the door aboard the Imperial transport that is supposedly holding the Wookiee prisoners is based on a label briefly seen at Echo Base in Star Wars: Episode V - The Empire Strikes Back (1980).
The look of the Imperial Speeder Bikes and the All Terrain Defense Pod (AT-DP) are based on early concept art by Joe Johnston.