Tesseract (comic story)

Tesseract is the third part of the story arc begun in Doctor Who Ongoing #1. It is divided into two chapters: "Time Smash" and "Implosion".

Summary
While the Doctor gives his new companions, Emily Winter and Matthew Finnegan, a tour of the TARDIS, the vessel is invaded by a number of dimension-hopping aliens. The Advocate places doubt into Matthew Finnegan's mind about the Doctor's morality, while the Tef'Aree have much the same effect upon Emily Winter. Meanwhile, the proximate cause of the invasion — the breech of the TARDIS by the Acari spaceship — forces the TARDIS interior to rearrange itself. Because the Doctor is psychically linked to the TARDIS, this trauma causes the Doctor to undergo temporary mental instability and his past selves begin to bleed through. Only by disengaging from the Acari ship and quickly restoring the proper console room will the Doctor's tenth persona fully reassert itself.

When Emily finds the right console, order is restored. But the Doctor's superphone rings before they can enjoy their victory. Martha Jones calls with an urgent appeal for the Doctor to return to Earth and help UNIT solve a mysterious new problem. ..

Characters

 * The Doctor
 * Matthew Finnegan
 * Emily Winter
 * Acari soldiers
 * The Advocate
 * Gizou posing as Acari soldier
 * Tef'Aree
 * Martha Jones (cameo)

Timeline

 * Tesseract occurs soon after: IDW: Fugitive (possibly immediately after as Emily changes out of her 1920s dress in part 1), and at some point after the events of DW: Planet of the Dead as the Doctor references Lady Christina.
 * The reference to Jack's sonic blaster and the veiled reference to River Song indicates that the Doctor hasn't yet met her (at the time this story was published it was unknown when the Doctor first met River (from River's perspective).