Factual error: When Hiro and Ando stand in front of a cinema in Berlin, Germany, you can see three movies posters in the background announcing a Buster Keaton festival. The left one shows his movie 'Cops' - but the German title 'Politzisten' is wrong - it should be 'Polizisten'.
Continuity mistake: "Our Father". At the end of the previous episode, "The Eclipse, Part 2", Hiro brought Claire to the rooftop of the Deveaux building to witness Kaito handing over baby Claire to Noah Bennet. To illustrate his point, Hiro showed Claire the exact same thing happening in the "9th wonder" comic book he brought with him, and she can follow the Japanese dialogue from there. But when the exact same scene is shown at the beginning of this episode, Hiro does not show Claire the comic at all.