|This article is about a/an episode in Power Rangers Samurai.|
|The Ultimate Duel|
|Power Rangers Samurai, Episode 18x20|
|Air date October 8, 2011|
| Written by Yasuko Kobayashi (Original screenplay)|
|Directed by Akihiro Noguchi|
The Ultimate Duel is the twentieth episode of Power Rangers Samurai. The episode continues events that took place in the previous episode and focuses on Deker's long desired duel with the Red Samurai Ranger. It's the Season Finale.
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 form and defeats the Moogers. Knowing Jayden is still weak, Antonio tries to stop Deker, but he challenges Jayden to a personal duel. Jayden says that he cannot accept the challenge as he is a samurai who protects the innocent. However, Deker tells Jayden that if he doesn't take the challenge, then he will harm random civilians. With this, Jayden accepts the challenge and is given 24 hours to rest. Deker instructs Jayden to meet at the beach.
At the Sanzu River, Octoroo and Master Xandred root for Deker. Rhinosnorus recovers from his recent battle as Xandred lectures him for his failure. At the Shiba House, Mia makes tea for Emily. They discuss the recent fight as Emily tries to cheer Mia up about hesitating to strike down Dayu. Mike invites the girls to the meeting about Jayden's duel. Jayden informs his friends about the challenge. Kevin is furious about Jayden's decision and fails to convince him to decline the challenge as a samurai does not fight unnecessary battles. Mia stands up for Jayden and tells them that he doesn't have a choice. A frustrated Jayden leaves the room to end the conversation 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 against Deker The rest of the gang drink tea in the dining room.
In the morning, Jayden wakes up and heads outside, where his friends give their blessings. Jayden hands leadership of the Samurai Rangers to Kevin. He also gives Kevin the Tiger and Beeetle discs in case they need to form the Megazord. Kevin leads the Rangers into battle as Rhinosnorus begins his attack. The Rangers morph into action to face off against the Nighlok. Jayden meets Deker at the beach and morphs.
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 Mega Mode. He takes the lead to form the Samurai Megazord. After a brief battle, the Megazord defeats Rhinosnorous. Gold Ranger watches the fight from below. Jayden and Deker continue their fight as neither is able to gain the upper hand. In a final move, Deker strikes Jayden critically, but Jayden drops the Spin Sword and grabs it with his left hand, landing a slash on Deker. Deker feels honored from his defeat as he falls from the cliff. A injured Jayden demorphs and takes in the fact that he won. At the Shiba House, Jayden, now with a broken arm, thanks Kevin for leading the team as Antonio gets dinner for them.
- Alex Heartman as Jayden
- Najee De-Tiege as Kevin
- Erika Fong as Mia
- Hector David Jr. as Mike
- Brittany Pirtle as Emily
- Steven Skyler as Antonio Garcia
- Rene Naufahu as Mentor Ji
- Jeff Szusterman as Master Xandred and Octoroo
- Kate Elliott as Dayu
- Felix Ryan as Spike Skullovitch
- Paul Schrier as Farkas Bulkmeier
- Rick Medina as Deker
- Campbell Cooley as Rhinosnorus
- When Jayden hands Kevin his Secret Disks so they can form the Megazord without him, he hands the Lion Disk and the Beetle Disk instead of the Tiger Disk. Jayden trusted the Beetle Disk to Mia, who then gave it to Mike in Forest for the Trees.
- Jayden should have given his Lion Folding Zord to complete the Megazord, as the disks only power up their weapons and allow them to transform to their special weapons.