Thompson assigns April to research the growing rat infestation. She is pursued by an army of rats and escapes on a passing city bus.

The Turtles are watching April's special report, live from the Army testing laboratory, on the first public display of a new super laser when a bolt of lightning from an electrical storm overloads the Super Laser's computer.

Krang's computers detect an alien metal on the surface of the Earth. Krang sends Shredder, along with an Alien Metal Detector, to the surface to find it.

After awaking from a nightmare in which he failed himself and his comrades in a battle against Shredder, Leonardo feels that he is unfit as a leader and, donning civilian clothes, decides to leave the lair.

While searching for a device to transform crude oil into liquid hydrogen, Krang accidentally brings Mr. Ogg from Dimension Z to earth.

Now successfully re-energized, The Technodrome begins moving towards the surface. Krang sends for a miniaturizer from Dimension X. With it he can shrink anyone and anything that stands in his path.

With the Technodrome in serious need for new equipment, Bebop and Rocksteady are sent to Earth, disguised in human form, to capture the Channel 6 building and return it to Dimension X.