Nico Harris

Season One

 * "The Begins: Part 1" (first appearance)
 * "The Begins: Part 2"
 * "High School Defenders"
 * "Back to the Future"
 * "The Nico Files"
 * "Of the Hulk"
 * "Divide and Conquer"
 * "Return of the Freddy Kreuger"
 * "Codename: Nebula"
 * "Homecoming Upset"
 * "Public Enemies"
 * "Bring it On"
 * "Academy of Power"
 * "The Knight of Victory"
 * "Game On"
 * "Return to High School"
 * "Face-Off"
 * "A Man Called Gibson"
 * "The Seal of Jafar"
 * "Action Heroes"
 * "Framed"
 * "Lost and Founded"
 * "Remote Control"
 * "24"
 * "Breakout"
 * "The Secrets of Vision"
 * "A Service to the Mercy"
 * "Royal Pain"
 * "Being Human"
 * "Eye of the Beholder"
 * "Step by Step"
 * "The Battle of Almighty"
 * "A New Hero Next Door"
 * "The Academy of Described"
 * "I, Dante"
 * "The Hunted"

Season Two

 * "A is for Army"
 * "B is for Battle"
 * "C is for Clone"
 * "D is for Discard"
 * "E is for Enemy"
 * "F is for Fight"
 * "G is for Guardian"
 * "H is for Hunted"
 * "I is for Illusion"
 * "J is for Jersey"
 * "K is for Knowledge"
 * "L is for Lost"
 * "M is for Mercy"
 * "N is for Nebula"
 * "O is for Overlord"
 * "P is for Protectors"
 * "Q is for Quest"
 * "R is for Revolution"
 * "S is for Self"
 * "T is for Titan"
 * "U is for Undivided"
 * "V is for Victory"
 * "W is for Warriors"
 * "X is for Xanadu"
 * "Y is for Young"
 * "Z is for Zero"

Season Three

 * "Secret Weapon"
 * "Heroes VS Villains"
 * "Worlds Apart"
 * "The Other Battle"
 * "Armageddon"
 * "The Nico Factor"
 * "Parents Night"
 * "F.A.D.S."
 * "Dante's Return"
 * "The Lord of Maleficent"
 * "First Stand"
 * "Thanos Strikes"
 * "Legend of Nico"
 * "Ultimate Machine"
 * "The Return of Nebula"
 * "A Crack in Time"
 * "Dream Warriors"
 * "The Marble Other Name"
 * "Revenge of the Knight"
 * "Double Trouble"
 * "Next Stop"
 * "Triple S"
 * "Wrath of Jafar"
 * "Legendary Heroes"
 * "The Rage of Lee"
 * "Zap Attack"
 * "House of Thanos"
 * "Exchange"
 * "Mind Control"
 * "Behold of Tara"
 * "Time Machines"
 * "Clash"
 * "Student Zero"
 * "A Battle of Enemy"
 * "Elementary"
 * "Legions of Thanos"

Season Eight

 * "Graduation"