Heracles
Hero who enters through Taenarum and masters Cerberus under Hades’ weaponless condition.

Overview
The Bibliotheca makes the capture of Cerberus Heracles’ twelfth labour. After purification and initiation at Eleusis, he enters Hades through the opening at Taenarum. Hades permits him to take the guardian only if he uses none of the weapons he carries. Protected by the lion skin, Heracles grips Cerberus until the creature yields, shows it to Eurystheus and then returns it below. This Bibliotheca account remains separate from the “phantom of Heracles” seen in the Odyssey. Here it serves as a handoff toward the next heroic book, not as a compressed life of Heracles. Across the twelve labours, strength is never the only answer: live capture, sacred limits, assistance, engineering, information and permission repeatedly change how a command can be completed, while Eurystheus retains the power to decide whether it counts.
Key facts
Methods beyond strength
The labours require fire, pursuit, diverted rivers, bronze sound, a travelling vessel, strategic knowledge, burden exchange and conditional permission in addition to close combat.
Further spoiler details are available in the interactive atlas.
Relationships
- Heracles Descends to Hadesdescends for the labour
Heracles enters Hades through Taenarum to complete the Cerberus labour.
- Taenarumdescends through
Pseudo-Apollodorus has Heracles enter Hades through the opening at Taenarum.
- Hadespermits the hound to be taken conditionally
Hades permits Heracles to take Cerberus on condition that he use none of his carried weapons.
- Cerberusmasters without weapons
Protected by the lion skin, Heracles masters Cerberus with his arms.
- Underworldreturns the guardian after display
After showing Cerberus to Eurystheus, Heracles returns the guardian to Hades.
- Labours of Heraclesundertakes the Labours
Heracles undertakes the full sequence under Eurystheus’ command.
- Eurystheuscommands service and labours
Following the Delphic direction, Heracles serves Eurystheus and receives the tasks.
- Nemean Lionstrangles in close combat
After arrows fail, Heracles blocks the cave and strangles the lion.
- Iolaushelps stop regrowth with fire
Iolaus cauterises the necks so Heracles can complete the Hydra fight.
- Lernaean Hydradefeats and takes the venom
Heracles defeats the Hydra, buries its immortal head and takes its venom.
- Ceryneian Hindpursues and captures alive
Heracles pursues the hind for a year and restrains it alive by the river.
- Artemisallows passage after his plea
After hearing that Eurystheus bears responsibility, Artemis allows the hind to be carried onward.
- Erymanthian Boarcaptures alive in snow
Heracles drives the boar into deep snow, exhausts it and binds it alive.
- Augean Stablescleans in one day by diverted rivers
Heracles diverts two rivers and cleans the stables in one day.
- Augeasbargains for a cattle reward
Without disclosing the command, Heracles agrees with Augeas on a share of cattle for success.
- Augeasrefuses payment after completion
After learning the task’s background, Augeas denies the bargain and withholds payment.
- Athenagives bronze clappers
Athena gives Heracles bronze clappers made by Hephaestus.
- Stymphalian Birdsdrives out with noise and shoots
Once the clappers startle the birds into flight, Heracles attacks with his bow.
- Minospermits but does not assist
Minos permits the taking but requires Heracles to manage the capture himself.
- Cretan Bullsubdues and captures alive
Heracles subdues the Cretan Bull alone and brings it back alive.
- Mares of Diomedesseizes and drives away
Heracles and his companions overpower the grooms and drive the mares to the sea.
- Diomedes of Thracedefeats the pursuing king
Heracles defeats the Thracian king during the Bistones’ pursuit.
- Hippolytaoffers the belt
After hearing his purpose, Hippolyta initially agrees to give Heracles the belt.
- Amazonsride armed toward the ship
Responding to the false report, the Amazons approach Heracles’ ship under arms.
- Hippolytakills after misreading the approach
Believing Hippolyta has betrayed him, Heracles kills her and takes the belt.
- Hippolytatakes the belt
After killing Hippolyta, Heracles takes the belt for delivery.
- Helioslends the golden cup
Admiring Heracles’ bold challenge to the sun, Helios lends the cup for the Ocean crossing.
- Geryonkills the herd’s defender
Geryon catches the cattle-taker and is killed by Heracles’ arrow.
- Cattle of Geryondrives away the cattle
After the guards and Geryon fall, Heracles drives the herd away.
- Eurystheusdelivers the recovered herd
Heracles delivers the recovered cattle to Eurystheus.
- Prometheusadvises using Atlas
Prometheus advises Heracles not to take the fruit himself but to use Atlas.
- Atlastemporarily bears the sky
Heracles takes the burden of the sky while Atlas fetches the apples.
- Atlastricks him into retaking the sky
Heracles asks Atlas to hold the sky only long enough to adjust a pad, then leaves with the fruit.
- Eurystheusdisplays the hound
Heracles brings Cerberus before Eurystheus for display.
- Argonaut Expeditionjoins the outward voyage
Heracles joins the outward voyage until Hylas disappears.
- Argonaut Expeditionurges departure
Heracles rebukes the delayed crew and makes them prepare to sail again.
- Hylastravels as companion
Hylas is raised by Heracles and travels with him on the outward voyage.
- Hylasremains to search
After hearing Hylas may be in danger, Heracles leaves the shore camp to search.
- Argosails before noticing his absence
The crew sails without knowing Heracles is still searching, leaving him in Mysia.
- Zeusfather of
Zeus is the father of Heracles.
- Alcmenemother of
Alcmene is the mother of Heracles.
- Apotheosis of Heraclesbecomes immortal
Hesiod places Heracles among the immortals after his labours.
- Megaramarried to
Euripides' Heracles presents Megara as the wife at the centre of the household crisis.
- Deianiramarried to
Deianira is Heracles' wife in the later Heracles tradition.
- Omphaleserves
In the Pseudo-Apollodorus route, Heracles is sold into service under Omphale.
Story appearances
- Gates of the UnderworldHero completing the Cerberus labour under Hades’ condition
Hero completing the Cerberus labour under Hades’ condition, part of the Underworld story's crossings, losses, judgments or guarded spaces.
- The Labours of HeraclesHeracles in the Labours
Heracles enters this story through Heracles' labours; when other stories return to the figure, they follow that later setting.
- The ArgonautsHeracles in the Argonaut expedition
Heracles enters this story through the Argonaut expedition; other versions are handled where their own episodes call for them.
Ancient sources
MythWeave distinguishes ancient-source evidence from later adaptations and modern interpretation.
- Pseudo-Apollodorus, Bibliotheca, 2.5.12: Taenarum, Hades’ condition, unarmed mastery, display and return
- Homer, Iliad, Book 19.95–133: Hera manipulates the births so Eurystheus receives rule first
- Pseudo-Apollodorus, Bibliotheca, 2.4.12: purification, Delphic command, service and the initial ten tasks
- Pseudo-Apollodorus, Bibliotheca, 2.5.1: the invulnerable lion, cave tactic and delivery of its skin
- Pseudo-Apollodorus, Bibliotheca, 2.5.2: regrowing heads, Iolaus and fire, poison and rejection
- Pseudo-Apollodorus, Bibliotheca, 2.5.3: year-long pursuit, live capture and Artemis’ challenge
- Pseudo-Apollodorus, Bibliotheca, 2.5.4: Pholus’ wine, the centaur conflict and live capture in snow
- Pseudo-Apollodorus, Bibliotheca, 2.5.5: reward bargain, river diversion, refusal and second rejection
- Pseudo-Apollodorus, Bibliotheca, 2.5.6: Athena’s bronze clappers drive the birds from cover
- Pseudo-Apollodorus, Bibliotheca, 2.5.7: bull variants, live capture, display, release and Marathon aftermath
- Pseudo-Apollodorus, Bibliotheca, 2.5.8: man-eating mares, Abderus’ death, defeat of the Thracian king and delivery
- Pseudo-Apollodorus, Bibliotheca, 2.5.9: Hippolyta offers the belt, Hera spreads a false report and conflict follows
- Pseudo-Apollodorus, Bibliotheca, 2.5.10: Helios’ cup, Erytheia, Geryon’s cattle and Hera’s gadfly
- Pseudo-Apollodorus, Bibliotheca, 2.5.11: Prometheus’ advice, Atlas’ burden, counter-ruse and return of the apples
- Diodorus Siculus, Library of History, 4.25.1–4.26.4: Cerberus eleventh, apples last, and alternative apple accounts
- Euripides, Heracles, Lines 1–25: the family awaits Heracles as he completes the Cerberus task
- Euripides, Heracles, Lines 815–1015: Iris and Lyssa bring madness after the hero returns