Force field A force field ( sometimes known as a " force shield " ) was an item of defensive technology that could be used to protect an object , person , or space . It was mostly employed to deflect outside forces , but could also be used to keep things in , such as oxygen or heat . Force fields had limitations . The larger the space one needed to protect and the more energy the force field was required to deflect , the higher the energy requirements of the force field . ( TV : " The Armageddon Factor " ) Article 57 of the Shadow Proclamation stated that enclosing a Level Five planet in a force field was illegal . Despite this , in the early 21st century the Atraxi enclosed the Earth in a force field in preparation for its destruction in order to capture Prisoner Zero . ( TV : " The Eleventh Hour " ) The term " force field " was used to cover a wide variety of defensive technologies based on an energy barrier . In the mid 1970s on Earth , Cessair of Diplos was capable of creating a static electric force field , ( TV : " The Stones of Blood " ) whilst it took until the mid - 21st century for force field technology to be common place on human - based spacecraft . ( TV : " The Wheel in Space " ) Force fields could be used in a passive form of aggression , such as preventing a ship from leaving a planet . ( COMIC : " Mission for Duh " ) Most spacefaring species , such as the Rill s ( TV : " Galaxy 4 " ) and the Dalek s , had some form of force fields for protection . ( TV : " Victory of the Daleks " ) Craft - based forced fields . In the 15th century , the Exxilon s used force fields on their ships to protect the fuel pods ( fuelled by plutonium ) against radiation exposure . ( PROSE : " The Left - Handed Hummingbird " ) The Doctor ' s TARDIS had a force field generator . While visiting Avalon , the force field trapped the First Doctor , Susan Foreman , Ian Chesterton , and Barbara Wright outside the TARDIS . ( PROSE : " The Sorcerer ' s Apprentice " ) In the 1970s the Second Doctor ' s recorder was protected from being converted into antimatter because it was inside of the force field generator . The Doctor gave the recorder to Omega , causing his antimatter world to be destroyed , along with the TARDIS ' force field generator . The Third Doctor decided to remain on Earth until the force field generator was rebuilt , even though the Time Lord s had lifted his exile on Earth . ( TV : " The Three Doctors " ) By the Doctor ' s ninth incarnation , he no longer had a force field generator , and instead used a tribophysical waveform macrokinetic extrapolator . ( TV : " The Parting of the Ways " ) During the Eleventh Doctor ' s life , the TARDIS again had a force field that it used to protect Clara Oswald in the time vortex when she was locked out of the TARDIS but refused to let go of the doors . ( TV : " The Time of the Doctor " ) In the early 21st century , spacecraft such as the " Titanic " were equipped with force shields to protect them from space - based hazards such as asteroid s . Warnings on the bridge would be sounded should they be lowered in the face of such dangers . ( TV : " Voyage of the Damned " ) Also in the early 21st century , the airborne military carrier the " Valiant " was equipped with force shields . They were defeated by Dalek weaponry . ( TV : " The Stolen Earth " ) In the latter part of the 21st century , Space Station W3 was armed with a force field in addition to an X - ray laser . ( TV : " The Wheel in Space " ) In the 42nd century , many human ships and bases had force fields to protect them from the effects of space . ( TV : " 42 " , " The Impossible Planet " ) 372nd century Morestran probe ship s had force fields . On Zeta Minor , this was coupled with the atomic accelerator to repel the anti - matter creature . ( TV : " Planet of Evil " ) By the year 200 , 100 , the Game Station was protected by a force field which prevented the invading Dalek Fleet from blasting it out of the sky , but it didn ' t stop the Dalek s from boarding the station . ( TV : " The Parting of the Ways " ) By 5 , 000 , 000 , 000 , Platform One was protected by a force field so that no damage would come to the station when the Earth was engulfed by the sun and destroyed . ( TV : " The End of the World " ) The War Lord s and the Time Lord s were both capable of creating force fields within their craft or facilities that were similar in appearance . ( TV : " The War Games " ) Device - based force fields . The Sontaran Styre imprisoned Sarah Jane Smith in a force field on Earth ( TV : " The Sontaran Experiment " ) in the year 16087 . In 2006 , Margaret Blaine stole a tribophysical waveform macrokinetic extrapolator that could generate a shield powerful enough to protect her from a nuclear meltdown . ( TV : " Boom Town " ) In 2007 , Torchwood Three owned a portable prison cell that could generate a funnel of energy around its captive . ( TV : " Day One " ) Last Great Time War - era Dalek prison cells used force field technology to hold their captives . ( TV : " Journey ' s End " ) Mr Smith was able to project a force field of limited range and power inside of Sarah Jane ' s attic . It was also capable of draining the power of any devices inside it . ( TV : " Enemy of the Bane " , " Goodbye , Sarah Jane Smith " ) In the year 4000 , when Bret Vyon was within the Doctor ' s TARDIS , the First Doctor created a " magnetic chair " which had a force field strong enough to restrain " a herd of elephants " . ( TV : " The Daleks ' Master Plan " ) On Wengrol , Yend scientists used force fields to restrain specimens . ( PROSE : " The Sons of the Crab " ) The Sea Devil s trapped a Royal Navy submarine in a force field when it tried to escape their base under the English Channel . The submarine freed itself by firing torpedo es at the cave wall , blasting itself out . ( TV : " The Sea Devils " ) Individual - specific force fields . Borusa had a " personal force - shield " that was provided by the medallion he wore . It kept both him and the Fourth Doctor safe when a Sontaran fired upon them , but its low battery prompted them to flee in order to avoid further attacks . ( TV : " The Invasion of Time " ) Encountering the Celestial Toymaker in 1980s Blackpool , the Sixth Doctor trapped him within a self - sustaining force field maintained by the Toymaker ' s own mental abilities . ( PROSE : " The Nightmare Fair " / AUDIO : " The Nightmare Fair " ) In 2002 , the Seventh Doctor created a force field generator which could tune into the Fearmonger ' s wavelength and used it to destroy the creature without harming its host . ( AUDIO : " The Fearmonger " ) In 21st century Cardiff , members of Cell 114 were protected by a force field that was one nanometre thick , mostly around the location of the implant . ( TV : " Sleeper " ) In 2050 K9 Mark 2 encountered the Bodach , a species that created a force field around themselves . ( TV : " Dream - Eaters " ) Species - specific force fields . Dalek s from the Last Great Time War era were surrounded by force fields that prevented bullets and energy weapons from making contact with their casings . ( TV : " Dalek " , " The Parting of the Ways " , " Doomsday " , " Daleks in Manhattan " , " The Big Bang " ) The Korven were capable of creating immobilising force fields . ( TV : " The Korven " ) The People of the Worldsphere created defensive drones that were protected by force fields . ( PROSE : " The Also People " ) Location - based force fields . As she worked in one the highest security rated rooms in the Capitol , Rodan was protected by a force field . She deactivated it to allow Leela access to the room , having taken a liking to the savage . ( TV : " The Invasion of Time " ) On Gallifrey in the Death Zone , the Dark Tower was protected by a force field that prevented entry to it via transmat and by TARDIS . It could be disabled from within the Tower however . ( TV : " The Five Doctors " ) The Dalek Asylum was protected by a force field , covering the entire planet . Despite wishing to preserve the Daleks contained there , when the security was compromised by a crashed star - liner , the Parliament of the Daleks sent the Eleventh Doctor and his companion s to lower the asylum ' s defences so they could destroy the asylum . Although the force field prevented the Daleks from destroying it , they managed to breach the force field via a gravity beam which allowed the Doctor and his companions to be sent there . The force field was eventually deactivated by Oswin Oswald , a human who was converted into a Dalek , allowing the Parliament to destroy the asylum and the Daleks imprisoned there . ( TV : " Asylum of the Daleks " ) The Papal Mainframe put a force field around Trenzalore to prevent the Time Lord s from returning to the universe should the First Question be answered . The force field also kept out numerous species such as the Dalek s , the Cybermen , the Sontaran s , the Terileptil s , the Slitheen , the Judoon and the Silurian s as they were prepared to attack the Time Lords and begin another time war . As many of the species tried to pass through the force field , the Daleks called for reinforcements and attacked the Mainframe , learning how to break the force field by torturing and killing Tasha Lem " several times " . The Siege of Trenzalore then became a war as the species orbiting the planet descended and fought against the Eleventh Doctor and the Church ' s Silent priests . All combatants except the Daleks died or retreated in the fighting . ( TV : " The Time of the Doctor " ) Other uses for force fields . Force fields could be used to form air corridor s , allowing the passage from one ship to another without the extension of any form of docking tube . These force field extensions could be filled with air to allow normal passage . ( TV : " The Horns of Nimon " ) Similarly , in 2008 when the Judoon used an HO scoop on the Royal Hope Hospital , transporting it to the Moon , they surrounded it with an airtight force shield . ( TV : " Smith and Jones " ) By the 30th century human s could achieve this form of technology . On Earth ' s moon they were able to project " force bubbles " onto the moon ' s surface , allowing for work to be conducted within an atmosphere . ( PROSE : " The Dust of Ages " ) Other forms of energy field . Gallifrey was protected by both a transduction barrier and a quantum force field . ( TV : " The Invasion of Time " )