Time & Time Again (comic story)

Summary
The Black Guardian has changed time so that the Doctor never left Gallifrey, Earth has been invaded dozens of times, it is now up to the Doctor and his companions to recover the Key to Time to give the White Guardian power to set time back on its proper course.

Characters

 * Seventh Doctor
 * Sixth Doctor
 * Fifth Doctor
 * Fourth Doctor
 * Third Doctor
 * Second Doctor
 * First Doctor
 * Bernice Summerfield
 * Frobisher
 * Ace
 * Adric
 * Jamie
 * Zoe
 * Black Guardian
 * White Guardian
 * Dalek

The Doctor

 * Meets his sixth incarnation, who is fishing with Frobisher for gumblejack and takes his sixth's self's cat badge (as one of the pieces of the Key to Time).
 * Saves his first incarnation from a Dalek (which was an Imperial Dalek).
 * He takes the TARDIS Instruction Manual from his first self. (This is one of the segments of the Key to Time)

Bernice Summerfield

 * Meets the Second Doctor, Jamie and Zoe and takes the Second Doctor's hat (as one of the pieces of the Key to Time).
 * Meets the Fourth Doctor whilst in the Eden projection. She takes a jelly baby (as one of the pieces of the Key to Time).

Ace

 * Sword fights the Third Doctor at Sir Reginald Styles' mansion. Ace takes one of the swords (as one of the pieces of the Key to Time).
 * Catches a cricket ball bowled by the Fifth Doctor. (This is one of the segments of the Key to Time)
 * Ace is flirted with by Adric (she threatens to make sure he permanently limps) at Cranleigh Hall.

Continuity

 * The Doctor broke the Key to Time up in DW: The Armageddon Factor.
 * The Doctor last encountered the Black and White Guardians during DW: Enlightenment.
 * Bernice meets the Second Doctor during DW: The Mind Robber and the Fourth Doctor during DW: Nightmare of Eden.
 * Ace meets the Third Doctor during DW: Day of the Daleks and meets Adric and see the Fifth Doctor play cricket during DW: Black Orchid.
 * The Doctor saves the First Doctor just before the events of DW: Remembrance of the Daleks and An Unearthly Child.

For the First Doctor:

 * This story occurs after DWM: Operation Proteus
 * This story occurs before DW: An Unearthly Child

For the Second Doctor:

 * This story occurs after DW: The Mind Robber
 * This story occurs before DW: The Invasion

For the Third Doctor:

 * This story occurs after DW: Day of the Daleks
 * This story occurs before DW: The Curse of Peladon

For the Fourth Doctor:

 * This story occurs after DW: Nightmare of Eden
 * This story occurs before CC: The Beautiful People

For the Fifth Doctor:

 * This story occurs after DW: Black Orchid
 * This story occurs before ST: In the TARDIS: Christmas Day

For the Sixth Doctor:

 * This story occurs after DWM: Funhouse
 * This story occurs before DWM: Kane's Story

For the Seventh Doctor:

 * This story occurs after NA: No Future
 * This story occurs before DWM: Cuckoo