Continuity: When you see Morden's picture on the screen before the theme title, he is smiling, but after the theme title ends, he is in a different position and is not smiling.

Deliberate "mistake": In this episode, a simple light frequency modulation enables Sheridan to briefly see the Shadow creatures. But because J. Michael Straczynski decided that this was just "too easy," the technique was "accidentally on purpose" forgotten about for subsequent episodes.