A common myth about "Star Trek" is that Khan recognizing Chekov in the film is a continuity error because "Space Seed", with the villain, was broadcast before Koenig's casting. "Adaptations: From Text to Screen, Screen to Text" calls this "the apparent gaffe notorious throughout Star Trek fandom". Although Chekov does not appear in "Space Seed", "Catspaw"—with the character—has an earlier stardate. Koenig joked that Khan remembers Chekov from the episode after he takes too long in a restroom Khan wants to use.