Character mistake: Troy uses the Surface Video Scan (SVS), but later calls it the "SVC".
Character mistake: When we first meet Gadus, he pronounces his name "Gay-dus", but later on in the episode Maran calls him "Gad-us".
Count Down - S1-E9
Character mistake: Everyone refers to the Professor as "Sanders", as does the poster at the main gate, but X20's letter is addressed to Professor Saunders.