When Worlds Collide (comic story)

When Worlds Collide was the fourth story in the ongoing Doctor Who (2011) series from IDW.

Summary
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When Worlds Collide (1)
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Allies, Armies and Anvils (2)
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An Army of One (3)
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Story notes

 * A new comic book-exclusive companion is introduced in the shape of Kevin, a robot shaped like a large dinosaur.

Continuity

 * The Doctor pretends to be a gunfighter called Doc Gallifrey while acting in a Wild West simulation. The Eighth Doctor witnessed an alternate reality in which he was a gunfighter, also called Doc Gallifrey, in a similar Wild West-like place. (COMIC: The Glorious Dead).
 * Rory mentions guarding a box for 2,000 years (TV: The Big Bang).