Character mistake: Rodney says that one hour in real time would give them months inside the field. This is incorrect because if the ratio of time were 1:250 as stated before, one hour would only convert to 250 hours, which is 10 days and 10 hours.
Character mistake: When Jaden uses the spell card Gift of the Martyr to increase Neos' attack points to 5400, T-Bone shouts "That ain't right. Fifty-four grand?", but fifty-four grand would be 54,000 and not 5400. (00:17:52)
Character mistake: When Collier is meeting all the 4400s at the reunion, Shawn calls Isabelle Maia by mistake. (00:31:10)
Character mistake: Professor Saotome checks the status of the Getter Robot when his son falls unconscious. The HUD output is written in awkward EngRish, from the first line of the status report, called; "Monitor the state of affairs", to smaller details like the article randomly used for certain lines ("a control device, a correspondent"). The biggest flub though is that the name of his son is "Tatsuhito", in proper romanization, but here appears as "Tatuto." (00:05:20)