When Imperious succeeded in transporting the Rangers to the Underworld, during the 2-part
Heir Apparent, so he could use their Legend Warrior powers to revive the Master, Udonna
attempted to stop it only to be attacked by the Master himself. After an onslaught of forgotten
memories flooded his mind, Koragg came to their aid at the last second. With the evil
influence that had bound him now broken, Koragg revealed himself to be none other than Leanbow,
shocking everyone present. He transported everyone out of the Underworld but despite that,
Nick refused to trust him and viewed his reappearance to be "one of Koragg's tricks".
Leanbow revealed his past about how he was transformed into Koragg by the Master,
but when he absorbed the Virus that Imperious used on the Manticore Megazord to save them,
it caused a unique side effect that caused him to regain his memory bit by bit.
Leanbow was quickly taken back to the Underworld and transformed into Koragg again,
leading to a final confrontation between him and Nick. He was on the verge of killing
the Red Ranger when Udonna intervened and revealed that Nick was, in fact, their son Bowen,
and the knowledge of this freed Leanbow from Koragg once more. The reunion was short-lived
as the Master began to tear his way out of the Underworld and Leanbow, using a spell to
prevent Udonna and the Rangers from intervening, travelled back to the Underworld to
fight and seal the villain once again. With his Mystic Force Fire Strike, he sacrificed
himself to bring down the Master and nearly all of the Underworld.
