Doctor Who: 14 Cool Details Revealed In David Tennant's The End Of Time Part One Commentary
12. The Story's Worse Alternate Title
Lots of Doctor Who episodes come close to having different titles, because the writers usually ponder a few ideas before settling on the one they like best.
For example, in The Eleventh Hour's commentary, Steven Moffat mentions that he almost called the episode "The Doctor Returns", and The End Of Time is another story that briefly flirted with an alternate moniker.
According to Lyn, Russell T Davies was strongly considering using "The Final Days Of Planet Earth" as the title for these episodes, and ultimately, we're glad he didn't, because The End Of Time is a lot snappier, and just a lot better overall.