The Lost Dimension (comic story)

The Lost Dimension was a miniseries published by Titan Comics. It served as a four-way crossover between Titan's ongoing series Doctor Who: The Twelfth Doctor, Doctor Who: The Ninth Doctor, Doctor Who: The Eleventh Doctor and Doctor Who: The Tenth Doctor, uniting the four Doctors and their companions, similarly to Supremacy of the Cybermen and Four Doctors.

Part one: Alpha
In a section of space, a white hole has opened and is consuming the surrounding space and planets. It has reached the planet, Sultath, where Jack Harkness and Tara Mishra are. Jack is trying to get the two of them off the planet, but interference from the hole prevents the vortex manipulator from working. He tries to contact the Ninth Doctor, but the interference affects the communication, and the Doctor assumes Jack is in a bar somewhere. With the Doctor not coming to their rescue, it seems all is lost, until the arrival of a mysterious woman in Gallifreyan armor.

At St. Luke's University, the phone in the Doctor's chambers starts ringing. Nardole answers the phone, and tells the person calling to hold, while he takes the phone and runs off down the hallway.

Over in the library, the Twelfth Doctor is looking at history books and tossing aside ones that are inaccurate, an act that makes it difficult for Bill Potts to study. Nardole arrives, handing the phone to the Doctor. The person on the other end tells him that she's dropping in for tea. The Doctor walks over to the nearby window and sees something that makes him turn around and yell for everyone to get out.

A bowship crashes into the library. The trio are perfectly unharmed, with Nardole protecting Bill. The Doctor remarks on the ship, before the cockpit opens, revealing the armored woman from earlier. However, the helmet is now off, revealing that she is Jenny, the Doctor's daughter.

Meanwhile, the Tenth Doctor, Gabby Gonzalez, and Cindy Wu are traveling in the Doctor's TARDIS. The Doctor is telling the two women about an adventure he had, when the Cloister Bell starts ringing. Suddenly, the trio find themselves in an earlier version of the TARDIS, and the Third Doctor is on the floor, being consumed by some white energy. The Tenth Doctor tries to help him, but the Third Doctor and his TARDIS fade away, leaving the trio back in their own TARDIS. According to the Tenth Doctor, the two TARDISes were merging, so his TARDIS had used an emergency temporal displacement to escape.

Back at the university, the four have moved to the Doctor's chambers and are enjoying some tea. Nardole is concerned. The Doctor assumes it's about the Vault, but he checked it, and it's completely fine. Nardole corrects him by saying he's more concerned about the crashed bowship, but the Doctor has dealt with that by calling in UNIT.

At the crash site, Kate Stewart has had the area closed off. Petronella Osgood marvels at the ship. But, as she touches it, her hand gets shocked by the strange white energy.

Back with the quartet, Jenny explains why she came here. After, meeting Jack and Tara, Jenny tried to save them, but the white hole consumed the duo. Jenny rushed back to her ship and followed them in, hoping to save them. But, the ship couldn't handle the stress and it looked like Jenny was doomed. However, luck was on her side, as the Fifth Doctor came to rescue her. After failing to extend the TARDIS's gravity shield around the bowship, the Doctor was left with no choice but to ram Jenny's ship. The bowship was freed, but the TARDIS was caught in the gravity of the white hole and was consumed.

Meanwhile, the Eleventh Doctor finishes repairing the TARDIS's translation matrix, allowing Alice Obiefune to be able to understand what he's saying. An alarm starts going off, prompting the Doctor to go check the console. The Doctor reveals that he lied when he told Alice that hearing the Cloister Bell was the worst thing that could ever happen. The alarm is being caused by the TARDIS's Doomsday Circuit, which goes off when it detects the end of time, or, in this case, space. The space around the TARDIS is being consumed by the white void.

Back at the university, the Twelfth Doctor asks how Jenny found him. She tells him that this is the only place and time he has stayed still long enough for her to locate him, that she was able to access. Bill has heard enough and knows they need to do something to help the Fifth Doctor, Jack, and Tara. Running over to the TARDIS, she reaches out her hand to open the door. As she touches the door, she is attacked by the white energy, which enters her body. At that moment, Kate and Osgood arrive. The Doctor asks Osgood to help him analyze the white energy attacking Bill, but she refuses. Osgood, Kate, and the UNIT soldiers have been possessed by the white energy. Osgood states that Bill will soon know peace, and so will the others.

Part two: Ninth Doctor Special
to be added

Part three: The Tenth Doctor
to be added

Part four: The Eleventh Doctor
to be added

Part five: Special #1
to be added

Part six: The Twelfth Doctor
to be added

Part seven: Special #2
to be added

Part eight: Omega
to be added

Characters

 * Twelfth Doctor
 * Eleventh Doctor
 * Tenth Doctor
 * Ninth Doctor
 * Fifth Doctor
 * Third Doctor
 * Jenny
 * Tara Mishra
 * Jack Harkness
 * Alice Obiefune
 * Nardole
 * Bill Potts
 * Kate Stewart
 * Osgood

Continuity

 * The Doctor recalls Jenny being created by his stolen DNA. (TV: The Doctor's Daughter)
 * The Doctor reassures Nardole that the Vault is secure. (TV: The Pilot et al.)
 * Jack is collecting Tara Mishra, who previously stayed behind on Nomicae to help its people during the aftermath of the battle over the Ninth Doctor's memories. (COMIC: The Bidding War)
 * Osgood is wearing another outfit inspired by the Doctor. (TV: The Day of the Doctor, Death in Heaven, The Zygon Invasion / The Zygon Inversion) This time, it is heavily based off the Sixth Doctor's fashion sense. (TV: The Twin Dilemma)
 * Jenny visits the Doctor during his tenure at St Luke's University. (TV: The Pilot) She claims that Trenzalore is the only other place he's stayed long enough for her to find him, but Tasha Lem's barriers prevented her from contact. (TV: The Time of the Doctor)
 * The Tenth Doctor's TARDIS briefly merges with the Third Doctor's, as it had previously with the Fifth Doctor's. (TV: Time Crash)
 * Nardole claims the Doctor has more lives than a cat nun. (TV: New Earth)
 * The Doctor's office phone has an exceptionally long chord, just as his TARDIS phone does. (TV: The Time of the Doctor)