2008

January

 * Owen goes undercover to prevent the Weevils being abducted by humans. (TW: Combat)
 * 10 and 11 - Sarah Jane Smith teams up with Maria Jackson to face up against the scheming Mrs Wormwood and the Bane. (SJA: Invasion of the Bane)

February

 * Jack Harkness and Toshiko Sato are transported back in time to the 1940s. Harold Saxon's campaign for election is underway as "Vote Saxon" signs are visible in Cardiff. (TW: Captain Jack Harkness)
 * The Cardiff rift opens, are people see visions of loved ones. Captain Jack defeats Abaddon. (TW: End of Days)
 * Jack hears the sound of the TARDIS, and re-joins the Doctor. (TW: End of Days and DW: Utopia)

April

 * Martha Jones joins the Doctor on his travels, after an adventure in which Royal Hope Hospital is transported to the Moon. (DW: Smith and Jones; The Sound of Drums, et al, establishes this occurs only a few days before the election.)
 * 28 - Mr. Saxon continues his campaign for Prime Minister. He was given high support after the Royal Hope Hospital's disappearance, then reappearance. (DW: Smith and Jones)
 * 29 - Richard Lazarus unveils an age-reversing machine which transforms him into a possible evolutionary branch of humanity, latent in his DNA. He is killed by the Doctor. (DW: The Lazarus Experiment)

May

 * 1 - Election Day begins and Harold Saxon is voted British Prime Minister (DW: 42/ The Sound of Drums; Note: This is likely a by-election, perhaps to replace whoever was appointed interim PM after the ouster of Harriet Jones per DW: The Stolen Earth))
 * 2 - U.S. President Winters is killed by the Toclafane. (DW: The Sound of Drums)
 * 3 - The Year That Never Was begins and the Master builds a Time Lord Empire (DW: The Sound of Drums/Last of the Time Lords)
 * 2 - Harold Saxon is killed by his wife Lucy. (DW: Last of the Time Lords)
 * Jack Harkness returns to Torchwood 3 and meets ex-time agent John Hart (TW: Kiss Kiss, Bang Bang)
 * Martha Jones returns home to her family and leaves the Doctor on his own (DW: Last of the Time Lords). Immediately after leaving her, the Tenth Doctor, due to a shield being down in the TARDIS (due to the events of The Year That Never Was) encounters the Fifth Doctor when their two TARDISes merge. (DW: Time Crash)

December

 * Near Christmas: Due to the previous two Christmases being disrupted by the arrival of alien spacecraft over London (DW: The Christmas Invasion) and DW: The Runaway Bride), most residents of the city voluntarily evacuate for the season. Those choosing to remain in the city include Queen Elizabeth II and Wilfred Mott, grandfather of Donna Noble. (DW: Voyage of the Damned)


 * 25 - The Tenth Doctor, following a brief meeting with his fifth incarnation (DW: Time Crash), finds himself aboard a space-faring replica of the Titanic in orbit around earth. Events of Voyage of the Damned.  Donna Noble would later dismiss the near-miss by the Titanic as a hoax. (DW: Partners in Crime)

Unknown

 * During an unchronicled adventure in London with Martha Jones, The Doctor meets Sally Sparrow, who provides him with the information he needs to escape when the Weeping Angels send him back to 1969. After this, Sally begins to open up to Larry Nightingale (DW: Blink. The episode was originally to have indicated that some months, possibly a year had passed since the defeat of the Weeping Angels and Sally's final encounter with the Doctor, but this was cut before broadcast.)
 * Following her encounter with the Tenth Doctor, Donna Noble attempts to improve her life by first travelling to Egypt. Afterwards, experiencing regret at turning down the Doctor's invitation to travel with him, Donna begins investigating unusual happenings, in hopes of encountering the Doctor doing the same. Her investigations lead to her learning about the disappearance of bees and unusual happenings at Adipose Industries, which eventually lead to her reuniting with the Doctor in 2009. (DW: Partners in Crime)
 * The Slitheen family kill overweight teachers and use them as a disguise to find a code to freeze the Sun, planning to fry the Earth. The Slitheen plan is foiled by Sarah Jane Smith, although a child Slitheen escapes.(SJA: Revenge of the Slitheen)
 * A Gorgon, hidden by a group of nuns while trying to find a new host, is discovered by Sarah Jane Smith. Maria Jackson uses a mirror to turn the Gorgon into stone. (SJA: Eye of the Gorgon)
 * A number of teenagers go missing after playing laser tag - Luke Smith and Clyde Langer are among those who go missing. Sarah Jane Smith discovers that they are being teleported by an alien named Kudlak who has taken them to a war ship to fight in an alien war - a war which he is unaware is over.(SJA: Warriors of Kudlak)
 * On the way back to Earth Sarah Jane Smith is handed a stone by a space ship driver. The Next day she gives it to Maria Jackson. The Trickster arrives on Bannerman Road and wipes Sarah Jane out of existence. The Only person who remembers her is Mario Jackson. Maria finds Andrea Yates in Sarah Jane's house, A school friend of Sarah Jane's who had died on a trip to Brighton at age 13. Maria tells her dad Alan Jackson but he did not believe her so she handed him the stone and Maria was wiped out of existence to. Alan at Andreas house party destroyed the mirror and the Trixter vanished releasing Sarah Jane and Maria. (SJA: Whatever Happened to Sarah Jane?)

January

 * 16 - Kiss Kiss, Bang Bang is broadcast, launching series 2 of Torchwood.
 * 23 - Sleeper is broadcast.
 * 30 - To the Last Man is broadcast.

February

 * Revenge of the Judoon, the third novella in the BBC Books Quick Reads series, is released.
 * IDW, an American comic book company, launches a new original Doctor Who monthly comic book series. Written and edited by Gary Russell, the stories initially feature the Tenth Doctor and Martha Jones. A few months before this, IDW launches a reprint series, Doctor Who Classics, which reprints newly colorized versions of Fourth Doctor stories from the early days of Doctor Who Weekly.
 * 6 - Meat is broadcast.
 * 13 - Adam and Reset are both broadcast.
 * 20 - Dead Man Walking is broadcast.
 * 27 - A Day in the Death is broadcast.

March

 * The BBC announced it was investigating technology to return colour to Third Doctor episodes only available in black and white.
 * 5 - Something Borrowed is broadcast.
 * 12 - From Out of the Rain is broadcast.
 * 19 - Adrift is broadcast.
 * 12 - Fragments is broadcast.

Spring

 * For the third year in a row, episodes of Doctor Who receive nominations in the Best Dramatic Presentation, Short Form category at the Hugo Awards. The 2008 Doctor Who episode nominees are Blink by Steven Moffat (making this his third consecutive Hugo nomination) and the Human Nature/The Family of Blood two-parter by Paul Cornell, along with the Torchwood episode Captain Jack Harkness by Catherine Tregenna. Also nominated is Razor, a spinoff telefilm based upon Battlestar Galactica and "World Enough and Time", a fan-film based upon Star Trek. The winner is scheduled to be announced in August.

April

 * 4 - Exit Wounds is broadcast, ending Torchwood's second series.
 * 5 - Partners in Crime is first broadcast, launching the fourth season of the revived series. Catherine Tate rejoins the series full-time as Donna Noble. Although the news that Billie Piper would return in Series 4 as Rose Tyler had been broken the previous fall by British media, and later confirmed by the BBC both in print and in a trailer shown in British cinemas in which Rose appeared, a cameo appearance by Rose in this episode remains a surprise. This is later attributed to the decision not to include the scene in preview copies sent to media and other parties. Not counting flashbacks, this marks Piper's first appearance in Doctor Who since Doomsday.
 * 12 - The Fires of Pompeii broadcast.
 * 19 - Planet of the Ood broadcast.
 * 26 - The Sontaran Strategem broadcast. Freema Agyeman returns to the series (temporarily) as Martha Jones, her first Doctor Who appearance since Last of the Time Lords.

May

 * The BBC announces that Russell T. Davies is to step down as executive producer of Doctor Who in 2009, to be succeeded by Steven Moffat. Soon after this announcement, media reports surface that noted comic book writer and author Neil Gaiman may have been approached to write a future episode.
 * The CBC in Canada announces it will air Serie 4 of Doctor Who beginning in September, but will not be broadcasting the second series of Torchwood.
 * Pest Control, the first original audio adventure released by BBC Audio, is released. Considered a spin-off of the BBC Books line, this marks Donna Noble's debut in such spin-off fiction.
 * 3 - The Poison Sky is broadcast. A second cameo by Billie Piper as Rose Tyler occurs; she receives screen credit for her appearance even though she is on screen for less than a second.
 * 10 - The Doctor's Daughter is broadcast, introducing the character of Jenny played by Georgia Moffett, who is the daughter of Fifth Doctor actor Peter Davison, and who once auditioned for the role of Rose Tyler. Freema Agyeman departs for a second time after this episode.
 * 17 - The Unicorn and the Wasp is broadcast.
 * 31 - Silence in the Library is broadcast, introducing Alex Kingston as River Song.
 * Late May - the BBC releases a new television trailer promoting the final episodes of the fourth series.
 * Martha in the Mirror, Snowglobe 7, The Many Hands first published. Although the character is no longer a regular on the series, Martha Jones remains the companion in these novels.

June

 * 3 - it is reported that Torchwood will return for a third series, with production scheduled for the fall of 2008 and broadcast in the spring of 2009, with the series moving to BBC One. John Barrowman is confirmed as returning. Initially, only a single five-episode serial, to be broadcast during one week, is initially confirmed.
 * 7 - Forest of the Dead is broadcast.
 * 14 - Midnight is broadcast.
 * Mid-June - American news media, including CNN, run profiles of Billie Piper, in conjunction with the debut of her series, Secret Diary of a Call Girl in the US. Coincidentally this spike in US coverage coincides with the lead-up to her return to the series in Turn Left, although her involvement in Doctor Who is given only a passing mention. At the same time, it is reported that Christopher Eccleston has been cast as Amelia Earhart's co-pilot in an upcoming film based on the ill-fated aviatrix's life, while John Barrowman makes Canadian headlines when he's named a judge for the talent contest series How Do You Solve a Problem Like Maria? for the CBC.
 * Mid-June - Holding out until the last possible moment, the BBC finally announces the title of Episode 12 of Series 4 will be The Stolen Earth.
 * 21 - Turn Left is broadcast.
 * In the associated episode of Doctor Who Confidential, Billie Piper reveals that the plan for Rose to return was in fact hatched before her departure from the series in 2006 and that she had been sworn to secrecy ever since.


 * 24 - Doctor Who wins the Best International Series at the 34th Annual Saturn Awards, an American entertainment awards program. The category is a new one introduced this year, and nominees include Torchwood, Steven Moffat's Jekyll and John Simm's Life on Mars. Due to an error, the category is left off the official press release of the winners, but is reinstated a few days later.
 * 28 - The Stolen Earth is broadcast. This historic episode marks the first three-way crossover between Doctor Who, Torchwood and The Sarah Jane Adventures.

September

 * Scheduled publication of Ghosts of India, Shining Darkness, The Doctor Trap, the first full-length novels featuring Donna Noble as companion.
 * 19 - Belated broadcast of Series 4 scheduled to begin on the CBC in Canada.

December

 * Scheduled publication of Beautiful Chaos, The Eyeless and The Story of Martha. The Eyeless is the first New Series Adventures release in which the Doctor travels without a companion; The Story of Martha will focus on the activities of Martha Jones during the Year That Never Was between The Sound of Drums and Last of the Time Lords.

Unknown dates

 * The BBC announces that the 5th series of Doctor Who will not air until 2010. Instead, several specials will be produced for broadcast in 2009. This hiatus is in order to allow David Tennant to perform a season of Shakespeare alongside Patrick Stewart during the time when Doctor Who is normally in production. This announcement is followed by media reports of Stewart expressing interest in guest starring in a future episode.