Plot hole: Jean Grey decides to wear her original X-Men uniform in her trial-by-combat. But how could she possibly have had the uniform with her? She wasn't wearing it when the X-Men were suddenly and unexpectedly abducted by the Shi'ar and taken into outer space, and the Shi'ar weren't about to let Jean go back home and grab it.
Continuity mistake: Professor X's usual hoverchair was destroyed by the Dark Phoenix in the previous episode, so the Shi'ar gave him a new one to use on their starship. However, when Professor X is lamenting over the X-Men's imminent defeat against the Shi'ar Imperial Guard, he is back in his original hoverchair. Towards the end of the episode, he is back in the Shi'ar hoverchair.