Wrong Place , Wrong Time " Wrong Place , Wrong Time " is the nineteenth episode of " " . Synopsis . On board the Destiny ' s Bounty , during a training session for Lloyd , the ninja attack him all at once while Sensei Wu and Nya watch . Lloyd manages to counter the attacks of Cole , Jay , and Zane , but Kai tricks him into falling for a certain move and subdues him . Lloyd comments that he would have seen that coming if he had focused more on his training prior to his transformation into an adult , at which Sensei Wu remarks that no one can change the past , but can only prepare for the future . He then orders the ninja and Lloyd to try again . Soon after , the Falcon arrives carrying bad news . After obtaining the data that the Falcon collected , the ninja discover that Lord Garmadon and the serpentine have returned to Ouroboros and are preparing for the final battle . Sensei Wu tells Nya to pilot the Destiny ' s Bounty there . The group soon arrives at Ouroboros and confronts Garmadon and the serpentine . Garmadon is about to use the Mega Weapon , but Lloyd freezes the weapon with an icy blast , and Garmadon runs away to break the ice off while the serpentine keep the ninja busy . While he is doing this , Garmadon remarks how he wishes that the ninja never came into existence , which gives him an idea . Using the Mega Weapon , he creates a portal branching into the past and uses it to travel back in time . The ninja arrive at the scene moments later , only for the city to start filling up with sand . The ninja wonder why this is happening , and Zane concludes that the city is returning to its former state , as if it were never discovered ; he goes on to say that this must mean that Garmadon has gone back in time in order to prevent Lloyd from becoming the Green Ninja . This becomes further apparent as Lloyd states that he cannot feel his hands , which suggests that his present state is beginning to disappear . Kai , Cole , Jay , and Zane enter the portal to stop Garmadon , with Sensei Wu warning them not to let anything in the past go altered . The ninja exit the portal in Kai ' s Village on the day that Sensei Wu recruited Kai to be a ninja . Kai recognizes the significance of this , and points out that Garmadon is probably trying to prevent him from becoming a ninja so that the four of them will not train Lloyd , causing the prophecy of the Green Ninja to go unfulfilled . The ninja see the Sensei Wu from that time period walking to the Four Weapons blacksmith shop in order to try and recruit the Kai from that period . After he leaves unsuccessful , the ninja pull him aside and tell him about what is going on and asking for his assistance ; Sensei Wu is confused , but agrees . At this time , the Skulkin invasion of Kai ' s village begins . Several Skulkins approach the ninja , and Jay fights them off gleefully . Kai notices Samukai approaching his past self , and informs Sensei Wu that his past self is about to be defeated and that Sensei Wu will need to save him . Sensei Wu does this , and Samukai escapes . Meanwhile , Garmadon disguises himself as a Skulkin and deliberately sabotages the other Skulkins ' attempt to kidnap Nya , causing them all to retreat . In the present , Sensei Wu notices Lloyd ' s image fading away from a picture of him and the ninja , indicating that Garmadon had been successful in altering the past . Back in the past , Kai reveals what the problem is : since rescuing Nya was his only motivation when he became a ninja , the lack of danger she is in means that his past self will have no motivation . Nevertheless , Sensei Wu still attempts to convince the Kai and Nya of that time to train under him and Kai agrees , though reluctantly and only because Nya thinks it would be exciting . The ninja oversee past - Kai ' s training the next day and realize that he still lacks the motivation , performing terribly and being incredibly difficult . They then conclude that they only way to fix the past is to get Nya kidnapped themselves and restore past - Kai ' s motivation . That night , Kai , trying to talk some sense into his past self , poses as past - Kai ' s reflection in the bathroom mirror and scolds him for his stubbornness , hoping past - Kai will think that it is his conscience reprimanding him . Meanwhile , Cole , Jay , and Zane disguise themselves as Skulkins and kidnap Nya . They do not go unnoticed , however , and they attract the attention of all of their past selves , resulting in them being forced to flee and forcing Kai to punch and knock out is former self in order to escape . The ninja are successful and make off with the captured Nya after notifying the past - Sensei Wu that they were successful , and the events in the past begin returning to normal : former - Kai ' s motivation has returned ; Sensei Wu proceeds in introducing him to the other ninja ' s former selves ; and back in the present , Lloyd ' s image returns to the picture of him and the ninja . The ninja deliver Nya to the Skulkins immediately afterward , and Garmadon realizes that he must ask his past - self for help . Past - Garmadon , though surprised by his future - self ' s appearance and four arms , agrees to help , and Garmadon whispers his plan to his past self , with the two laughing maniacally when he is done . In the present , Lloyd ' s image once again fades away from the photo of him and the ninja . Meanwhile , the ninja have set up camp in the trees above their former selves in the Forest of Tranquility , determined to remain in the past until they make sure that everything continues to go as planned . Soon , Kai sees his former - self chasing after an illusion of Nya , just like he had once done , and the ninja chase after him . Just like they had expected , Kai arrives at the Fire Temple , frees the imprisoned real Nya , and retrieves the Fire Sword , but at that moment , future - Garmadon arrives and starts fighting former - Kai . Future - Kai realizes that his former self will never be able to defeat Garmadon and his four arms , but upon mentioning Garmadon ' s four arms , he is struck with an idea . He leaps to his former self ' s assistance , providing him with " four arms " as well , and Cole and Zane follow . However , Garmadon still overpowers them . Zane suggests that by destroying the Mega Weapon , they may be able to completely erase the changes to the past that have been made so far . When Cole says that nothing of lesser power than the Mega Weapon can destroy it , Jay returns with the Four Golden Weapons , having gone in search of them after figuring that the ninja would need them . He suggests using them to destroy the Mega Weapon , since the Mega Weapon was forged from those weapons themselves , rendering them equally as powerful . The ninja direct the blasts from the weapons towards the Mega Weapon and succeed in destroying it , transporting everyone back to the present . Upon reaching the present , the ninja find themselves aboard the Destiny ' s Bounty , and , not seeing Lloyd at first , they fear that they failed in their mission and that Lloyd is no longer the Green Ninja . However , Lloyd reappears just then , causing them to rejoice . Lloyd doesn ' t seem to know about Garmadon ' s plot to go back in time or the Mega Weapon , suggesting that the ninja erased the Mega Weapon from existence entirely . When Lloyd questions them further , Kai states that some things are better left in the past and that they should focus on the future . They all laugh at this , except Lloyd , who , still not knowing about their adventure , doesn ' t get the joke . The episode ends with Sensei Wu on the Destiny ' s Bounty ' s roof , staring at the stars . The largest star flickers promisingly , and the episode ends .