Doctor Who: Out of Time 2 - The Gates of Hell

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...