1 and 2. Hero Up Time!
13.Den x 2= Trouble
(Another Den 10 appears on the streets, but is wreaking havoc! Den must find out the identity of this doppelganger and end him, meanwhile, he has a relationship to maintain)
14.One Teammate Down
(Den's relationship with Euni has reached a standstill, however an assassin plans to kill Euni. Can Den save her in time?)
(Still toubled by the events that happened in the previous episode, a Den from the future visits this Den and asks for his assistance)
(A group of humans with alien powers approach Den for assistance, saying they are old friends of Den.)
17.Den 10 Supreme Aliens/Zen 10 Infinite Aliens Crossover- All Webbed Up
(A crossover special!! Zen 10 from a another dimension appears in Den's universe to hunt down an alien creature before it spreads chaos across the street)
18.The Supreme Secret
(Den starts having control issues with his supreme alien forms and only Azmuth knows why)
19.Those Dark Times...
(A person claiming to be an old friend of Den zaps him and he starts having memories of his forgotten past during his middle school years)
(Den's world starts changing but he does not realize it, suddenly a voice in his head claiming is from the future warns him about a time space catastrophe)
21.Trouble In Tokyo
(Den heads over to Tokyo to meet some friends he met in martial arts school a long time ago)
22.Bubbles Shall Pop
(Den decides to go to another part of Japan to visit an elementary school friend of his. Meanwhile. some green-haired crazy monkey is kidnapping humans and monkey aliens and mutating/merging them)
23.Shattering Dimensions Part 1
24.Shattering Dimensions Part 2
Did you know?... Random trivia of Den 10, cuz why not?!