|The Ultimate Duel (18th)|
|Written by||Jonathan Rosenthal|
|Directed by||Akihiro Noguchi|
|Original airing:||October 8th 2011|
In the forest, Dayu attacks the Yellow Rangers and walks away. Mia feels bad for trying to help her. She helps Mia back on her feet. At the warehouse, Deker confronts Jayden and Antonio. The swarm of Moogers enter the scene. Deker transforms into his Nighlok for and defeats the Mooger. Antonio tries to stop Deker from the challenge. Deker gives Jayden 24 hours for the ultimate duel. Jayden only fights to protect the innocent. Deker leaves the scene with a threat. Jayden accepts the challenge.
At the Sanzu River, Octoroo and Master Xandred root for Deker. Rhinosnorus recovers from his recent battle. Xandred lectures the Nighlok for his failure. At the Shiba House, Mia makes tea for Emily. They discuss the recent fight. Emily tries to cheer Mia up. Mike invites the girls to the meeting. Jayden informs his friends about the challenge. Kevin is furious about Jayden's decision and fails to convince him to decline the challenge. In the forest, Deker listens to Dayu's crying. He tells Dayu about his challenge. Dayu tells Deker that he should've been free centuries ago. Kevin helps Jayden to train. The rest of the gang drink tea in the dining room. Deker prepares for his final fight.
In the morning, Jayden wakes up and heads outside, where his friends give their blessings. Jayden gives Kevin the two Power Discs in case they need to form a Megazord. Kevin leads the Rangers into battle. Rhinosnorus begins his attack. The Rangers morph into action to face off against the Nighlok. Jayden meets Deker at the beach. He morphs into action.
Red Ranger and Deker face off in the ultimate duel. In the city, the Rangers continue their fight against Rhinosnorus and the Moogers. Blue Ranger defeats the Nighlok, who grows in this zord form. He takes the lead to form the Samurai Megazord. After a brief battle, the Megazord defeats the Nighlok. Gold Ranger watches the fight from below. Red Ranger and Deker continue their fight. Deker is excited about their duel. Red Ranger defeats Deker with a master move. Deker feels honored from his defeat as he falls from the cliff. Red Ranger demorphs and celebrates his victory. His friends enter the scene to help him on his feet. At the Shiba House, Jayden thanks Kevin for leading the team. Antonio delivers dinner for their victory.
|Alex Heartman||Jayden Shiba, Red Samurai Ranger|
|Najee De-Tiege||Kevin, Blue Samurai Ranger|
|Erika Fong||Mia Watanabe, Pink Samurai Ranger|
|Hector David Jr.||Mike, Green Samurai Ranger|
|Brittany Anne Pirtle||Emily, Yellow Samurai Ranger|
|Steven Skyler||Antonio Garcia, Gold Samurai Ranger|
|Ricardo Medina Jr.||Deker|
|Jeff Szusterman||Master Xandred (Voice)|
|Jeff Szusterman||Octoroo (Voice)|
|Kate Elliott||Dayu (Voice)|
|Campbell Cooley||Rhinosnorus (Voice)|