2000s

On Earth, the 2000s - or the 00s - was the first decade of the 21st century.

The 2000s brought an increasing number of widely seen alien encounters. This led to widespread knowledge of alien life. Following the public revelation of alien life in the late 2000s suicide rates doubled. (TV: Children of Earth: Day One) In the following decade humanity continued to encounter more aliens and other supernatural events.

Alien incursions on Earth
There were several attempted alien invasions, alien related actions, unspecified events, space time events and individual actions of Earth, into the atmosphere or surface by a multitude of races and species throughout this period.

Attempted alien invasions

 * The Kulan invasion (PROSE: Escape Velocity)
 * Autons attacking central London. (TV: Rose)
 * The Sycorax attempted an invasion on Christmas Day, causing a third of the Earth to stand at the top of buildings. (TV: The Christmas Invasion)
 * The Battle of Canary Wharf. (TV: Army of Ghosts / Doomsday)
 * The Webstar descended on central London on Christmas Day. (TV: The Runaway Bride)
 * The Toclafane invasion in the Year That Never Was. (TV: The Sound of Drums/The Last of the Time Lords)
 * The relocation of the Earth to the Medusa Cascade, coupled with a Dalek invasion of the planet. (TV: The Stolen Earth/Journey's End)
 * The attempted enslavement of all life by the Ancient Lights acting through Martin Trueman. (TV: Secrets of the Stars)

Alien-related actions

 * The poisoned rain the future Mondasian Cybermen. (COMIC: The Flood)
 * The Slitheen incursion into Downing Street marked the beginning of humanity's first contact, but was considered a hoax by many. (TV: Aliens of London/World War Three)
 * The threat of magnetic inversion of Earth, and the Mondasian Cyberman invasion of the South Pole. (PROSE: Iceberg)
 * The interference of the Atraxi. (TV: The Eleventh Hour)
 * The abduction of the Royal Hope Hospital to the Moon by the Judoon. (TV: Smith and Jones)
 * The Mondasian Cybermen attack from Lonsis, via the portal in the main branch of Hulbert Logistics. (AUDIO: Human Resources)
 * The near crash of the Titanic on Buckingham Palace on Christmas Day. (TV: Voyage of the Damned)
 * The exodus of the Adipose, hastened and shortened by the Tenth Doctor and Donna. (TV: Partners in Crime)
 * The ATMOS incident. (TV: The Sontaran Stratagem/The Poison Sky)
 * The Stingrays attempted to devour the Earth to a desert through a wormhole. (TV: Planet of the Dead)
 * The 456 incident. (TV: Children of Earth: Day One, Children of Earth: Day Two, Children of Earth: Day Three, Children of Earth: Day Four, Children of Earth: Day Five)
 * The release of the Rakweed in London. (TV: The Gift)
 * Humanity was briefly transformed into the Master Race and Gallifrey appeared above the Earth, which caused panic amongst humanity. (TV: The End of Time)

Space-time events

 * Events of Siberia leading to the creation of multiples alternate universes. Sabbath attempted to create a living black hole, so as to send it to the Event Zero. (PROSE: Time Zero)
 * The Temporal Paradox between the Angels, Sally Sparrow, Larry Nightingale, the Tenth Doctor and Martha Jones. (TV: Blink)
 * The Cardiff Rift crisis. (TV: End of Days)

Unspecified events
As the Eighth Doctor forewarned to Chang Lee, an unknown incident occurred in San Francisco, on Christmas Day 2000. (TV: Doctor Who)

In 2008, the "Four Things and a Lizard" event was taken care of by the Tenth Doctor and Martha Jones. (TV: Blink)

Individuals' actions

 * At the very beginning of the decade, the Master tried to destroy the Earth with the Eye of Harmony, in San Francisco. (TV: Doctor Who)
 * Sabbath attempted to make Guy Adams a living host for the diamonds, which would become the Council of Eight in the first place. (PROSE: Timeless)
 * The takeover and destruction of LINDA by the Abzorbaloff in his hunt for the Doctor. (TV: Love & Monsters)
 * The attempted collision of the Moon into the Earth by Mr Smith. (TV: The Lost Boy)
 * The massacre of the guest, staff and paramedics in Lazarus Laboratories by Richard Lazarus as a giant scorpion like creature. (TV: The Lazarus Experiment)
 * The brushfire attacks on Cardiff by Gray and John Hart. (TV: Exit Wounds)
 * At some point between 2000 and 2003, Courtney Woods was born to Mr and Mrs Woods. (TV: Kill the Moon)
 * Two Varaxils, who had been waiting for 350 years near Tranchard's Folly for their victim to re-emerge from the well, finally had their final encounter and were killed by Mary Shelley and Aleister Portillon. (AUDIO: The Witch from the Well)

Behind the scenes

 * The first half of the decade saw several "false alarms" of new Doctor Who TV and film productions.
 * Meanwhile, BBC Books continued its prolific lines of Doctor Who novels.
 * Telos Publishing obtained the licence to produce original novellas based upon Doctor Who.
 * Bernice Summerfield, no longer the star of her own Virgin Publishing novels, was featured in numerous novels, short stories and audio dramas produced by Big Finish.
 * The BBC experimented with new media, producing several Doctor Who webcasts consisting of original stories featuring original series cast members. In 2003, a webcast entitled Scream of the Shalka introduced Richard E Grant as the voice of the Ninth Doctor.
 * In late 2003, BBC Wales announced that it will be producing a new live-action Doctor Who series, with Christopher Eccleston as the Ninth Doctor (the Richard Grant version of the character was abandoned). The series debuted in the spring of 2005 and almost instantly reinstated Doctor Who as a national institution.
 * BBC Books discontinued its line of Eighth Doctor and Past Doctor novels in favour of a new line of hardcover fiction featuring the Ninth (and later the Tenth) Doctor.
 * Big Finish Productions obtained the licence to publish the Short Trips book series.
 * After one season, Eccleston left Doctor Who and David Tennant was introduced as the Tenth Doctor.
 * Two spin-off series were launched: Torchwood and The Sarah Jane Adventures.
 * A third spin-off series, K9, was launched outside the BBC by Metal Mutt Productions.
 * In 2008, Tennant announced his departure from Doctor Who. Matt Smith, a largely unknown actor at the time, was cast as the Eleventh Doctor at the age of 26; he later debuted in 2010.
 * After four extremely successful seasons under the watch of Russell T Davies, Doctor Who went on partial hiatus for 2009, producing a number of specials in lieu of a full season. This was to allow Davies to hand over production duties to Steven Moffat, and also pave the way for Tennant's departure.