: Leonardo suffers a crisis of confidence and decides to leave the team.

: Shredder and Krang use a device called the Solar Siphon to drain energy from the sun, causing the Earth to enter a "deep freeze".

: After a pep talk from a stranger, Leonardo realizes his duty and returns to help his brothers defeat Shredder and Krang before the planet freezes. Quick Facts

: While Leonardo is away, Michelangelo, Raphael, and Donatello each take turns attempting to lead the team to stop the villains' plan.

"" is the 15th episode of Season 3 of the 1987 Teenage Mutant Ninja Turtles animated series. Episode Summary