Ep 11. The Superman in Black Syndrome

An alien ship in Earth's orbit is breached by three alien criminal, seeking to steal a Tomassitron Matter Amplifier. Although the device is activated in the attempted theft, MIB prevents it being stolen by bringing the ship to Earth. While K, J and L deactivate the Amplifier, all three discover that they have gained super powers from the device's rays, and quickly find themselves the only ones to stop the criminals when they too also develop powers of their own.