Sometime after the previous episode, T.K.O. and Shadowy Venomous have become a terrifying duo laying waste to everything. Dendy attempts to cheer everyone up to no avail. When Lord Boxman is kicked out of Boxmore, he abandons his bots as he feels that he can no longer provide for them, resulting in Dendy recruiting them as the Plaza's new saviors.
In this epilogue, K.O. finds his life moving unexpectedly fast, as he begins missing moments in his life. As many of his friends and family grow up and move on, he begins to suspect that a villain is behind this odd conundrum. However, no matter how many villains he faces, he cannot keep things from changing. He learns to accept that he needs to grow up and move on in life. A final montage plays depicting what became of everyone, ending with K.O. becoming the new owner of the Bodega and signing off with "Thank you for watching the show!"
The Pow Card company decides to hold a tournament with T.K.O. joining for his and Shadowy Venomous' own nefarious scheme. Rad and Enid join in to rescue their friend and stop the villains once and for all. Shadowy Venomous manages to secure the glorb tree for himself and plans to drain the powers of all the heroes in the world. K.O. fights his way out of T.K.O.'s mind and discovers a hidden memory that could very well save his and everyone else's lives.
Lu blackmails Nadia, and Samuel confronts Carla with his suspicions. In the future, Guzmán is interrogated about the missing student.
Seeking the truth about Marina's death, Samuel attempts to seduce Carla. Lu's new friend, social media guru Cayetana, hosts an impromptu party.
Painful truths and dark secrets are exposed as the students unburden themselves and the circumstances behind Samuel's disappearance are revealed.
Pressured by his friends, Polo's guilt overwhelms him. Cayetana's mother threatens to reveal her secret. Ander and Guzmán argue with their partners.
Lu uncovers a secret while helping Cayetana with her fundraiser party. Omar worries about Samuel's fate. Ander's behavior confuses Guzmán.
New students start school at Las Encinas as Guzmán continues to mourn his sister and Christian struggles with his secret. A classmate goes missing.
Polo and Ander have a heart-to-heart. Nadia gets creative to stop Guzmán from drinking too much and doing drugs. Rebeka's mother offers Samuel a job.
Rebeka teases Cayetana with what she's learned. The Halloween party takes a troubling turn. Samuel walks in on a shocking scene.
Sandi Toksvig looks at some quirky questions with Alan Davies, Loyiso Gola, Jason Manford and Sarah Millican.
The season premiere continues the apocalyptic events of last season as Trigon sets out to win the Titans over to his side by embracing their inner darkness.
Jason Rygaard fights the weather while hauling heavy, slick trees on the steepest setting of the season; Danny Pihl and his veteran crew precisely drop 250-foot, old-growth cedars next to a group of cabins; Wade Etienne struggles to control his customized, new, track cutter: Brutus; and brothers Jay R and Brandon Harkness overload their skyline and blow out the tail-hold.
Annie and Mau revisit a traumatic birthday. Elaine calls DeSean twenty times a day and he's fed up. Sarah wants a baby, but Lauren isn't ready to be a mom because she just became a woman. Evelyn and Alan make a painful decision. Dr. Orna Guralnik wrestles with an overwhelming sense of responsibility she feels for her patients.
Solidifying his cover identity in Buenos Aires, Eli makes a serendipitous connection. But his fervor puts the entire mission in jeopardy.
Eli's mission takes a dangerous turn as he tries to report on a secret military installation. Back home, Nadia struggles to raise the children alone.
Eli makes an influential ally. Though early operations in Damascus quickly bear fruit, Dan fears Eli's bold methods will get him killed.