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... Cast: : David Tennant (The Doctor), Peter Davison (The Doctor), Nicholas Briggs (The Cybermen), Shelley Conn (Tina Drake), Mark Gatiss (Joseph Delon), Glen McCready (Marcel Delon/Charles VI). Other parts played by members of the cast.
