Gerry Anderson Encyclopedia
Gerry Anderson Encyclopedia

Danger at Ocean Deep is the 22nd produced, and the 19th broadcast, episode, of the British television series Thunderbirds.


When the tanker Ocean Pioneer I disappears into a mysterious fog-bank in the Mediterranean Sea - and subsequently explodes (with no survivors) - Jeff Tracy sets Brains and Lady Penelope Creighton-Ward, each working separately, the task of discovering what happened and why. There's good reason to be concerned: a sister ship, Ocean Pioneer II, has just been launched, and could potentially suffer the same fate. Brains and Tin-Tin finally pinpoint the cause: a literally-explosive chemical reaction between the ship's cargo of liquid Alsterene, and OD60, an organic substance found only in certain undersea locations - including the Mediterranean!

When urgent radio calls from Tracy Island, trying to warn OPII, are met only with an ominous silence, International Rescue rushes into action - it's a race against time, before fate repeats itself!


  • This episode is noteworthy for featuring John Tracy's first (and only) on-air rescue mission in which he directly participates. While at home on leave from his bi-monthly duties on Thunderbird 5, John gets the call to go with Virgil aboard Thunderbird 2, to support Scott with evacuating the OPII crew before the endangered vessel explodes...


Danger at Ocean Deep on Thunderbirds Wiki:

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International Rescue: Jeff TracyScott TracyVirgil TracyAlan TracyGordon TracyJohn TracyBrainsTin-Tin KyranoLady Penelope Creighton-WardAloysius Parker
Others: Lucille TracyKyranoGrandma TracyThe Hood

TV Series Episodes:
Season 1
Trapped In The SkyPit of PerilThe Perils Of PenelopeTerror In New York CityEdge Of ImpactDay Of Disaster30 Minutes After NoonDesperate IntruderEnd Of The RoadThe UninvitedSun ProbeOperation Crash-DiveThe Mighty AtomCity of FireThe ImpostorsThe Man From MI.5Cry WolfDanger at Ocean DeepMove - And You're DeadThe Duchess AssignmentBrink Of DisasterAttack of the Alligators!Martian InvasionThe Cham-ChamSecurity Hazard
Season 2
Atlantic InfernoPath of DestructionAlias Mr. HackenbackerLord Parker's 'OlidayRicochetGive Or Take A Million

Thunderbirds Are GoThunderbird 6

Audio Adventures:
Introducing ThunderbirdsF.A.B.The Stately Homes Robberies

Young CorgiThe Vault

Tracy IslandCreighton-Ward Mansion

Thunderbird 1Thunderbird 2 (Pod Vehicles: MoleFireflyDOMOElevator CarsTransmitter TruckRecovery VehiclesMonobrakeExcavatorMobile CraneFire TruckLaser CutterThunderizerNeutralizer TractorJet-Air TransporterFire TenderYellow Trailer Truck | Red and Black TruckRed Curved Vehicle) • Thunderbird 3Thunderbird 4Thunderbird 5Thunderbird 6
Other Craft and Vehicles