On Fins and Needles

16-year-old Nicole and 14-year-old Susie are teaching yet another martial arts class together. Vita Repulsa sends the Slippery Shark to put a spell on the two. The spell turns them into enemies. The Rangers have to find a way to stop the two from fighting.

Trivia
This is similar to the episode in Power Rangers Super Megaforce where Kelly Hale and Samantha Morgan are placed under a spell that turned them into enemies.