Cerberus first appears when Hades is riding down the River Styx and is fed a massive steak (which the three heads fight each other over). Later, Hercules tames the beast and uses him to get to Hades' inner sanctum, though this is only a temporary turn driven by fear.
Cerberus made a few appearances in the series as a rambunctious puppy that Hades has difficulties in controlling.
Cerberus's largest role in the series was in the episode "Hercules and the Visit From Zeus" while plotting another scheme to take over Mount Olympus, Hades is interrupted by a playful Cerberus who makes off with a model of Olympus while attacking Pain and Panic. Later, Hades is dragged across the Underworld while walking the pup, when Cerberus discovers the Fates all seeing eye much to the annoyance of the three hags. Hades retrieves the Fate's eye from his monstrous mutt when he gets a glimpse of a mortal. The Fates reveal that mortal was Zeus. Seeing a golden opportunity to rid himself of his brother once and for all, Hades sends Cerberus after Zeus. The episode also revealed that Cerberus was a gift to Pain and Panic from Hades, as the two were said to have pestered the latter for a pet.
Cerberus later appears in the episode "Hercules and the Underworld Takeover". Cerberus appears alongside the Fates and Hades's other underlings snarling at Hecate until she commanded him to sit during her hostile takeover of the Underworld.
Cerberus makes a cameo in the episode "Hercules and the Comedy of Arrows". Pain and Panic get their hands on the extra loathe arrows Icarus created when Cupid tried to dispose of them. They return to the Underworld with the arrows much to Hades's fury for mistaking the loathe arrows for Cupid's love arrows. Hades throws one of the loathe arrows out of the window of his lair on to a sleeping Cerberus now, fueled by the power of the arrow attacks Pain and Panic.
Cerberus makes a cameo in "Hercules and the Tiff on Olympus", where Zeus was hearing Hercules's calls for help and Cerberus chews on Zeus's cloud.
Cerberus is a three-headed beast from the Underworld that Hercules has to defeat to finish his Twelfth Labor. Before Hercules can confront the hellhound in the Enchanted Forest, he runs into Megara, who is running away from it. He urges her to keep running, while he stays to fight Cerberus. During the battle, Hercules goes for one of Cerberus' heads, but he is unable to fend himself from the two other attacking heads. He is eventually killed by Cerberus, who goes on to chase down Megara and kill her as well. Both Hercules and Megara left with unfinished business because of how they died, end up in the Underworld.
In the Underworld's underground prison, Megara remains trapped, unable to escape because Cerberus keeps a watchful eye on her. Another prisoner, Hook, convinces her to break out with him, but as soon as they begin making their way through the tunnels, Cerberus' roar warns them that they are being pursued. Before they are cornered, Hook allows Megara to flee on her own, telling her to find Emma once she gets out. Hook is left to fight off Cerberus, who slashes him several times on his neck, and he's saved only when Hades takes him away to his lair. Cerberus continues to stalk Megara, finding her in the woods, but Emma manages to teleport herself, Megara, and Regina away before the hellhound reaches them. Mary Margaret enlists Hercules' help to kill Cerberus, in the hopes of finding Hook, as well as clear away Hercules' unfinished business. With Emma, Regina, and Mary Margaret, Hercules enters the mines to look for the beast, eventually venturing deeper in by himself. Coming face-to-face with the glowing eyes of the three-headed dog, Hercules becomes terrified and runs back to his party. The group, hearing Cerberus quickly approaching, prepare to attack, only for Hades to call off his pet. From Hades, Mary Margaret learns of Hercules' greatest shame, that he died fighting Cerberus. Later, she asks for details about the battle, in order to figure out why he lost in the first place. When Hercules admits the two other heads of Cerberus were too much for him, Mary Margaret realizes he needs two other people to kill the creature. Cerberus, tracking Megara to an apartment, slams into the building seconds before she escapes. Joined by Hercules and Mary Margaret, Megara teams up with them, with each person taking out one of Cerberus' heads. After all heads are incapacitated, Cerberus dies, dissolving into black dust.
Cerberus appears several times throughout the Kingdom Hearts series, usually as a servant of Hades.
In Kingdom Hearts, he ruins the Games by battling Hercules, although Sora, Donald, and Goofy step in and defeat him. This deed earns them the titles of "Junior Heroes". Cerberus appears again as the twentieth opponent in the Hades Cup.
In Kingdom Hearts II, Hades sends Cerberus after Sora, Donald, Goofy, and Auron, who were escaping from the Underworld. The chase ended with the quartet managing to get away from the beast after a battle.
Cerberus also makes a minor appearance in Kingdom Hearts coded as a data version.
The Cerberus is based on the Greek mythological creature of the same name, a monstrous three-headed dog whose job was guarding the entrance of the Underworld. He was also Hercules' twelfth and final labor.
In the film, Cerberus was the last of Hades's forces to be conquered by Hercules before defeating the Lord of the Dead, himself.
TV Series:Chipacles • Hestia • Icarus • Cassandra • Adonis • Helen of Troy • Tempest • Circe • Triton • Galatea • Pandora • Medusa • Echidna • Typhon • Echidna's Children • Furies • Hecate • Canis and Lupus • Nemesis • Mr. Parentheses • Homer • Fear and Terror • Ibid • Antaeus • Prometheus • Daedelus • Morpheus • Kronos • Gaia • Amphitrite • Achilles • Theseus • Orion • Nestor & Meleager • King Midas • Melampus • Lavina • Ajax • Andromeda • Syrinx • Electra • Mr. Griff • King Minos • Tivius • Orthos • Queen Hippolyte • Momalus • Arachne • Caucasian Eagle • Sphinx Martindale • Gegeneis • Wargs
Episodes
Season One: "Hercules and the Apollo Mission" • "Hercules and the King of Thessaly" • "Hercules and the Secret Weapon" • "Hercules and the Assassin" • "Hercules and the Big Kiss" • "Hercules and the River Styx" • "Hercules and the Techno Greeks" • "Hercules and the World's First Doctor" • "Hercules and the Pool Party" • "Hercules and the Prince of Thrace" • "Hercules and the Tapestry of Fate" • "Hercules and the Living Legend" • "Hercules and the Return of Typhon" • "Hercules and the Owl of Athena" • "Hercules and the Girdle of Hippolyte" • "Hercules and the Bacchanal" • "Hercules and the Underworld Takeover" • "Hercules and the Comedy of Arrows" • "Hercules and the Hostage Crisis" • "Hercules and the Disappearing Heroes" • "Hercules and the Argonauts" • "Hercules and the Drama Festival" • "Hercules and the Phil Factor" • "Hercules and the All Nighter" • "Hercules and the Song of Circe" • "Hercules and the Trojan War" • "Hercules and the Dream Date" • "Hercules and the Big Games" • "Hercules and the Jilt Trip" • "Hercules and the Falling Stars" • "Hercules and the Golden Touch" • "Hercules and the Minotaur" • "Hercules and the Son of Poseidon" • "Hercules and the Twilight of the Gods" • "Hercules and the Griffin" • "Hercules and the King For a Day" • "Hercules and the Pegasus Incident" • "Hercules and the Big Sink" • "Hercules and the Big Lie" • "Hercules and the Prom" • "Hercules and the Spartan Experience" • "Hercules and the Complex Electra" • "Hercules and the Long Nightmare" • "Hercules and the Arabian Night" • "Hercules and the Aetolian Amphora" • "Hercules and the Romans" • "Hercules and the Yearbook" • "Hercules and the Odyssey Experience" • "Hercules and the Grim Avenger" • "Hercules and the Spring of Canathus" • "Hercules and the Big Show" • "Hercules and the Tiff on Olympus"
Season Two: "Hercules and the First Day of School"" • "Hercules and the Visit from Zeus" • "Hercules and the Driving Test" • "Hercules and the Parent's Weekend" • "Hercules and the Prometheus Affair" • "Hercules and the Hero of Athens" • "Hercules and the Caledonian Boar" • "Hercules and the Epic Adventure" • "Hercules and the Poseidon's Cup Adventure" • "Hercules and the Muse of Dance" • "Hercules and the Kids" • "Hercules and the Gorgon" • "Hercules and the Green-Eyed Monster"
TV series songs:Send My Boy to School • My Town • Pericles of Athens • Promethean Ditty • The Agora • The Bacchanal • The Man That I Love • Pucker Up or Let Him Snooze • That's How the Story Goes • Aphrodesia Dance • Love Is In The Air • Since the Light Went Away • Ain't Life a Beach • Can-Do King • Helping Hands • Midas Curse • King of Mules • Kronos Stone • What's a Mother to Do? • Sreamin' Grecian Teenage Blues • Lethe Water on the Brain! • One Good Man • You're My Hero
Locations
Ancient Greece • Mount Olympus • Underworld • Phil's Island • Thebes • Prometheus Academy • Atlantis City
Original Worlds:Destiny Islands • Traverse Town • Radiant Garden/Hollow Bastion • Disney Castle/Disney Town/Timeless River • Dive to the Heart • End of the World • Realm of Darkness • Twilight Town/Mysterious Tower • The World That Never Was • Castle That Never Was • Land of Departure/Castle Oblivion • Keyblade Graveyard • Daybreak Town/Scala ad Caelum
Books:Once Upon a Time: Shadow of the Queen • Once Upon a Time: Out of the Past • Once Upon a Time: Red's Untold Tale • Once Upon a Time: Regina Rising
Season One: "Pilot" • "The Thing You Love Most" • "Snow Falls" • "The Price of Gold" • "That Still Small Voice" • "The Shepherd" • "The Heart Is a Lonely Hunter" • "Desperate Souls" • "True North" • "7:15 A.M." • "Fruit of the Poisonous Tree" • "Skin Deep" • "What Happened to Frederick" • "Dreamy" • "Red-Handed" • "Heart of Darkness" • "Hat Trick" • "The Stable Boy" • "The Return" • "The Stranger" • "An Apple Red as Blood" • "A Land Without Magic"
Season Two: "Broken" • "We Are Both" • "Lady of the Lake" • "The Crocodile" • "The Doctor" • "Tallahassee" • "Child of the Moon" • "Into the Deep" • "Queen of Hearts" • "The Cricket Game" • "The Outsider" • "In the Name of the Brother" • "Tiny" • "Manhattan" • "The Queen Is Dead" • "The Miller's Daughter" • "Welcome to Storybrooke" • "Selfless, Brave and True" • "Lacey" • "The Evil Queen" • "Second Star to the Right" • "And Straight On 'Til Morning" Season Three: "The Heart of the Truest Believer" • "Lost Girl" • "Quite a Common Fairy" • "Nasty Habits" • "Good Form" • "Ariel" • "Dark Hollow" • "Think Lovely Thoughts" • "Save Henry" • "The New Neverland" • "Going Home" • "New York City Serenade" • "Witch Hunt" • "The Tower" • "Quiet Minds" • "It's Not Easy Being Green" • "The Jolly Roger" • "Bleeding Through" • "A Curious Thing" • "Kansas" • "Snow Drifts" • "There's No Place Like Home" Season Four: "A Tale of Two Sisters" • "White Out" • "Rocky Road" • "The Apprentice" • "Breaking Glass" • "Family Business" • "The Snow Queen" • "Smash the Mirror" • "Fall" • "Shattered Sight" • "Heroes and Villains" • "Darkness on the Edge of Town" • "Unforgiven" • "Enter the Dragon" • "Poor Unfortunate Soul" • "Best Laid Plans" • "Heart of Gold" • "Sympathy for the De Vil" • "Lily" • "Mother" • "Operation Mongoose" Season Five: "The Dark Swan" • "The Price" • "Siege Perilous" • "The Broken Kingdom" • "Dreamcatcher" • "The Bear and the Bow" • "Nimue" • "Birth" • "The Bear King" • "Broken Heart" • "Swan Song" • "Souls of the Departed" • "Labor of Love" • "Devil's Due" • "The Brothers Jones" • "Our Decay" • "Her Handsome Hero" • "Ruby Slippers" • "Sisters" • "Firebird" • "Last Rites" • "Only You" • "An Untold Story" Season Six: "The Savior" • "A Bitter Draught" • "The Other Shoe" • "Strange Case" • "Street Rats" • "Dark Waters" • "Heartless" • "I'll Be Your Mirror" • "Changelings" • "Wish You Were Here" • "Tougher Than the Rest" • "Murder Most Foul • "Ill-Boding Patterns" • "Page 23" • "A Wondrous Place" • "Mother's Little Helper" • "Awake" • "Where Bluebirds Fly" • "The Black Fairy" • "The Song in Your Heart" • "The Final Battle" Season Seven: "Hyperion Heights" • "A Pirate's Life"• "The Garden of Forking Paths" • "Beauty" • "Greenbacks" • "Wake Up Call" • "Eloise Gardener" • "Pretty in Blue" • "One Little Tear" • "The Eighth Witch" • "Secret Garden" • "A Taste of the Heights" • "Knightfall" • "The Girl in the Tower" • "Sisterhood" • "Breadcrumbs" • "Chosen" • "The Guardian" • "Flower Child" • "Is This Henry Mills?" • "Homecoming" • "Leaving Storybrooke"
Once Upon a Time in Wonderland: "Down the Rabbit Hole" • "Trust Me" • "Forget Me Not" • "The Serpent" • "Heart of Stone" • "Who's Alice?" • "Bad Blood" • "Home" • "Nothing to Fear" • "Dirty Little Secrets" • "Heart of the Matter" • "To Catch a Thief" • "And They Lived..."
Once Upon a Time in Wonderland: Wonderland Castle • The Mad Hatter's House • White Rabbit's House • Underland • Tulgey Wood Both series:Storybrooke • Maine • Enchanted Forest • Forbidden Fortress • Wonderland • Wonderland Maze • Agrabah • Sherwood Forest • The Sultan's Palace
Objects
Once Upon a Time: Once Upon a Time (Book) • Red Riding Hood • Maleficent's Staff • Magic Wand • Glass Slipper • Poisoned Apple • Spinning Wheel • Magic Lamp • Dark One's Dagger • Chipped Cup • Jefferson's Hat • Magic Beans • Captain Hook's Hooks • Enchanted Candle • Pixie Dust • Dreamshade • Salad Fork • Pandora's Box • Silver Slippers • Sorcerer Hat • Enchanted Broom • Trident • Enchanted Shell • Heroes and Villains (Book) • Merida's Bow • Magical Rose • Excalibur • Olympian Crystal • Cinderella's Dress • Golden Scarab Beetle • Rapunzel's Frying Pan • Magical Golden Flower • Shrinking Potion • Floating Lanterns • Tarot Cards • Maui's Fish Hook
Original Songs:Powerful Magic • The Queen Sings • Love Doesn't Stand a Chance • Revenge Is Gonna Be Mine • Wicked Always Wins • Charmings vs. Evil Queen • Emma's Theme • A Happy Beginning
