Time Fugitives: Part 1 - S2-E7
Continuity mistake: When Bishop is shown returning to his original timeline, he is wearing the temporal band on his right arm. However, when he was sent back to his timeline at the end of the episode Days of Future Past: Part 2, he was not wearing the band because Rogue tore it off his arm and crushed it, which is what caused him to be sent back in the first place. (00:05:08)