Conspiracy - S1-E25
Continuity mistake: In the beginning of this episode, Riker orders Geordi (who was navigator at the time) to increase to Warp 6. In response, Geordi replies, "Aye sir, full impulse."
Continuity mistake: At the end, when Teddy and his friends get the directions to the Wizard's fortress, Prince Arin's hair is bright yellow as he shakes Wooly's hand. In the next shot it's back to his normal orange hair.
The Catwoman from Channel Six - S2-E12
Continuity mistake: The watch on Irma's left wrist repeatedly appears or disappears between shots, as well as mid-shot, and it even switches to her right wrist. Two examples: at the subway station, Irma walks toward the Turtles, and her watch switches from her right wrist to her left; when Irma finally meets her "dream man," the "hunky Splinter guy" in the sewer lair, her watch vanishes.