In a climactic battle, the Rangers face off against Master Xandred for the last time.
When Serrator asks Deker to fulfill the final piece of his destructive plans, Antonio begs Deker to reconsider his role in the battle between humans and the Nighlok.
The Rangers discover that Serrator's recent attacks have an ulterior motive - to crack open the earth and let the Sanzu flood it and thereby become ruler of both worlds.
Following a drone strike in Afghanistan and the finding of a retired marine's body in the ruins of the bomb-making compound, the team investigates the man's loyalties and connections to the Taliban.
Jayden doubts that he has what it takes to be the Red Ranger; Master Xandred demands Serrator return Dayu's Harmonium.
Kevin and Mike must work like a team when a Nighlok glues their hands together.
Emily loses confidence; a Nighlok's black sand causes desperate hunger and thirst in the Rangers.
The Rangers battle a Nighlok that creates mirror images confusing them; Spike looks for a job to help Uncle Bulk.
Kevin is unable to help the team when a Nighlok eats his Samuraizer; Dayu and Deker make a deal with Serrator.
Mia's younger brother comes to town trying to convince her to sing in his band.
Octoroo kidnaps Antonio and Mentor to use as bait in order to lead the other Rangers into a Mooger trap.
Antonio's teammates try to help him conquer his new fear of fish. Meanwhile, Master Xandred gains an ally in his plan to flood the planet.
When a Nighlok traps the spirits of four rangers, Mike and Emily must figure out how to defeat him and save their friends.
The Rangers must defeat an armored Nighlok without Antonio's help.
The Rangers discover cracks in the earth where water from the Netherworld is seeping in; a Nighlok uses the evil water to keep from drying out.
When Erica Flynn, someone Jane helped convict of murder, claims to have information about the death of a charity worker, Jane has her furloughed in exchange for that information.
Twas the night before Christmas and all through the Shiba House the teens reflect on their first year together as a team and as friends, followed by a snowy Christmas morning that brings them an unexpected lesson about the true spirit of the holidays.moreless
As the teens continue their transition into their new secret lives as Samurai Rangers, Yellow Samurai Ranger Emily reveals a surprising truth about herself. Meanwhile, after a Nighlok attacks, the Rangers combine their Zords to create the powerful Samurai Megazord to protect the planet from the monster.moreless
The Rangers must enter the Dream World to save the Gold and Pink Rangers from a Nighlok.