Spiral Staircase (comic story)

 was the second part of the fifth story of the Doctor Who: The Tenth Doctor comic strip series, published in 2015. It served as a sequel to Pyramids of Mars.

Summary
A terrifying pyramid has appeared in the skies above New York City, and it's here to claim an ancient secret – buried in the body of a very-much alive movie star!

As the Doctor attempts to unravel the conflict, Gabby and Cindy's friendship is stretched to breaking point. Has Gabby changed too much in her short time away – or has she changed just enough to save the day?!

Part one
to be added

Part two
to be added

Characters

 * Tenth Doctor
 * Gabby Gonzalez
 * Cindy Wu
 * Cleo
 * Dorothy Bell
 * Erik Ulfriksson
 * Hanif
 * Seeker
 * Trinity Wells
 * Vivian
 * Anubis

Original print details
to be added

Continuity

 * Dorothy notices Gabby's sketchbook. (COMIC: The Arts in Space, The Weeping Angels of Mons, et al.)
 * Erik and Hanif are high priests of the Cult of the Black Pyramid. They talk about how Marcus Scarman travelled to the forbidden pyramid and became a servant of the gods, and alongside their high priest and his estate were killed in a great fire. They see this as the revenge of the gods. The Doctor explains that they were Osirans and not gods. (TV: Pyramids of Mars)
 * The Doctor recalls the Daleks engineering the Medusa Cascade. (TV: The Stolen Earth / Journey's End)