The Gates of Hell (audio story)

 was the second story in the Out of Time series, produced by Big Finish Productions. It was written by David Llewellyn and featured David Tennant as the Tenth Doctor, Peter Davison as the Fifth Doctor and Nicholas Briggs as the Cybermen.

Publisher's summary
Paris, 1809. The Fifth Doctor takes a tour of the Catacombs and meets a sassy Time Agent doing the same...

Paris, 1944. The Tenth Doctor misses his target and lands in occupied France. He hides from the Nazis – in the Catacombs.

A collision of two Doctors' timelines triggers a temporal catastrophe, granting the Cybermen dominion over the Earth.

The Doctors must travel back in time to find the source of the Cyber-invasion and close the Gates of Hell...

Plot
to be added

Cast

 * The Doctor - David Tennant
 * The Doctor - Peter Davison
 * Tina Drake - Shelley Conn
 * Joseph Delon - Mark Gatiss
 * Marcel Delon / Charles VI - Glen McCready
 * The Cybermen - Nicholas Briggs

Continuity

 * Agent Drake asks if the Doctor has a robot dog, to which he replies that he doesn't anymore. (TV: Warriors' Gate)
 * The Fifth Doctor remembers meeting a minotaur the last time he was in the Parisian catacombs. (COMIC: The Forgotten)
 * The Fifth Doctor remarks how the Cyber-Leader looks different to the other Cybermen. (AUDIO: Return of the Cybermen) Agent Drake has seen Cybermen but is unfamiliar with these models; the Doctor tells her they are an earlier generation. (TV: The Invasion, AUDIO: The Early Cybermen)
 * The two Doctors recall encountering each other before. (TV: Time Crash)
 * The Tenth Doctor remembers having ice cream with Romana in Paris, though the Fifth corrects him on the exact location of this. (TV: City of Death)
 * Joseph Delon proclaims the rule of the Cyber-Empire as "the Age of Steel". (TV: The Age of Steel)