Power Rangers Hero Force Episode 4-7: Ninja Quest

Plot
In this episode, the Rangers win a volleyball tournament. Dr. Nefarious finishes constructing his new Doomsday robot. Nefarious and his robot arrives and challenges the Rangers, who summon the Red Dragon Thunderzord and Mega Tigerzord. At first the Power Rangers seem to have the upper hand, until four monsters Nefarious created arrive as part of a trap. The Red Dragon Thunderzord gets badly damaged and starts to malfunction. At the Underground Lair, Minnie and Tech try desperately to give extra power to the Red Dragon Thunderzord, but the Morphing Grid overloads. Jack is then thrown out of his cockpit, demorph involuntarily and watch helplessly as the Red Dragon Thunderzord explodes and falls apart. As a result, the original Dinozord is destroyed too and the Power Coin is damaged beyond use.

Jack returns to the Underground Lair while the others deal with Nefarious to learn that the Power Coin was created by a legendary being called Ninjor. Jack decides to search the treacherous Desert of Despair to find him. Dark Monat and Ranamon learn that Jack is going after the Ninja powers and send the newly hatched Tenga Warriors to deal with them. Jack runs from the birds to a long cave with a dead end. They learn that the cave's walls dematerialize as part two ends showing Jack going through.

Jack finds himself a garden after passing through the cave walls. There, he finds giant gates leading into a temple. Jack enters the gate. Inside the Temple, Jack finds Ninjor. Jack tells Ninjor of the destruction of his Zord by Nefarious. Ninjor gives him his new powers and Zord. Jack uses his new Ninja Ranger powers to defeat the Tengas still waiting outside the Temple. He uses his new Ninja Coin to morph into the Red Alien Ranger which is renamed as Red Ninja Ranger, and teleports to Toontown in order to use his new Ninjazord against Nefarious and his robot. Meanwhile, an Vampirus egg is hatching in front of the Temple Gates...

Jack defeats Nefarious's robot with the Red Ape Ninjazord. Meanwhile, Ninjor has his hands full at the temple battling the Vampirus that hatched from the egg. The Rangers show up just in time and together, they destroy the Vampirus. Ninjor later says that he will help the Rangers whenever they need it.