Howard Strongsleeves

Season One

 * "The First Face-Off" (first appearance)
 * "A Traitor Among Us"
 * "Remote Control"
 * "Zap Attack"
 * "Framed"
 * "New Girl"
 * "Back to the Future"
 * "Crush"
 * "Deceive and Conquer"
 * "Going Under"
 * "I Lost My Parts"
 * "On the Line"
 * "The Ultimate Enemy: Part 1"
 * "The Ultimate Enemy: Part 2"
 * "Ill Suited"
 * "Two Powers Become One"
 * "Game On"
 * "The Mindy Project"
 * "Fool's Gold"
 * "Public Enemies"
 * "Size Me Up"
 * "24"
 * "Fallen Hero"
 * "Homecoming"
 * "Breakout"
 * "Eye of the Beholder"
 * "Simple"
 * "Being Human"
 * "A Shock to the System"
 * "The Hunted"

Season Two

 * "Bring it On"
 * "The Academy"
 * "I, Justin"
 * "The Human Factor"
 * "Supernatural Tuesday"
 * "Next Stop"
 * "The Return of Nebula"
 * "Young at Heart"
 * "Everybody Talks About Weather"
 * "Year of the Justin"
 * "The Big Job"
 * "A Piece of the Action"
 * "Big Time"
 * "Crossing Signals"
 * "Walk This Way"
 * "The Golden Years"
 * "Furious Jealousy"
 * "Like Father, Unlike Son"
 * "Step by Step"
 * "Magic Enemy "
 * "Bonding"
 * "All the News"
 * "Royal Pain"
 * "The Unseen Guide"

Season Three

 * "Black Out"
 * "Grounded"
 * "What Are Girl Made Of"
 * "Mind Games"
 * "The Love Cruise"
 * "Nursery Crimes"
 * "A New Hero Next Door"
 * "The Good Wife"
 * "Number One"
 * "House of Justin"
 * "Shapeshifter"
 * "Grande Size Me"
 * "Ongoing"
 * "Fanning the Flames"
 * "Two to Tutor"
 * "Double Cross My Heart"
 * "Trading Faces"
 * "Less Than Zero"
 * "Body Guard Duty"
 * "Attack of the Stitches"
 * "Wrath of the Other"
 * "Stop, The Presses"
 * "Enterprise"
 * "Freddy's Return"

Season Four

 * "Family Business"
 * "Hero of the Hourglass"
 * "The Legacy of Thor"
 * "Of the Thanos"
 * "The Mission"
 * "Elementary"
 * "Triple Threat"
 * "A Service to the Community"
 * "The Justin Files"
 * "Movin' on Down"
 * "Dreamscape"
 * "Fathers and Sons"
 * "High Frontier"
 * "Double Image"
 * "Exchange"
 * "Worlds Apart"
 * "Last Stand"
 * "A Forgotten Yesterday"
 * "The X Factor"
 * "A Gigantic Mission"
 * "Nobody's Vision"
 * "Yesterday's Heroes"
 * "Return to High School"
 * "The Army of One"

Season Five

 * "Big Fat Lair"
 * "Imagine"
 * "The Seal of Stitches"
 * "Return of the Freddy Kreuger"
 * "Eye of the Templest"
 * "The Case of the Machines"
 * "Cold Case"
 * "Splitting Images"
 * "Hall of Fame"
 * "Worlds on Fire"
 * "Play On"
 * "Hiddent Talent"
 * "My Brother's Keeper"
 * "Foes Don't Forgive"
 * "Big Brother"
 * "Flirting with Disaster"
 * "Memory Blank"
 * "Fight the Enemy"
 * "Loser's Circle"
 * "F.A.D.S."
 * "Best Friends Forever"
 * "Empire"
 * "The Next Generation"
 * "Rewriting History"

Season Six

 * "Parental Bonding"
 * "Money for Nothing"
 * "Fashion Victim"
 * "Blush"
 * "The Eye of Theif"
 * "Parents' Night"
 * "From the Force"
 * "The Final Frontier"
 * "Underworld"
 * "The Cupid Effect"
 * "A Serpent's Tale"
 * "Mather and Fervent"
 * "The Mascot"
 * "Inside Freddy"
 * "Armageddon"
 * "Clothes Minded"
 * "The Truth Hurts"
 * "Job Unfair"
 * "Triple S"
 * "Of All the Luck"
 * "The Secrets of Machines"
 * "Guilt for Free"
 * "The Full Nebula"
 * "Competition"

Season Seven

 * "Heroes VS Villains"
 * "Fire Fighters"
 * "Jurassic Park"
 * "Microforces"
 * "No Girls Alone"
 * "The Full Machine"
 * "An Power Mess"
 * "The Chamber of Secrets"
 * "Too Cool to be Mom"
 * "All the Right Angles":
 * "Rules of Engagment"
 * "Just Kidding"
 * "First Stand"
 * "Steal Wheels"
 * "Breaking Bad"
 * "The Lost Chronicles"
 * "League of Ethan"
 * "Black"
 * "And They Counted"
 * "Transfer"
 * "Car Trouble"
 * "All That Glitters"
 * "The Doppelganger Gang"
 * "Bad Moose Rising"
 * "Fame"
 * "The Gauntlet"

Season Eight

 * "Resurrection"
 * "The Krakin Awakens"
 * "Hyper Reality"
 * "Partners"
 * "Serving Two Masters"
 * "Full Circle"
 * "Remember the Titans"
 * "Earth to Justin"
 * "Natural Magnetism"
 * "Brain Drain"
 * "Furious Jealousy"
 * "When Captain Klegghorn Calls"
 * "First Kiss"
 * "Eye for an Eye"
 * "The High School Planet"
 * "Perchance to Dreams"
 * "The Future"
 * "A Battle of Equals"
 * "Deception"
 * "The Final Face-Off"
 * "Graduation"