Writin' Across Universes

Trip and Malcolm tackle their most difficult time correction yet, for personal reasons. There are two time jumps in the chapter (2165 and 2153).

ENT "The Expanse","Twilight" 

One of the questions I always had w/the whole Xindi arc: Wouldn't Earth have any planetary defense systems when the initial weapon appeared in 2153? I thought the lack of them was pretty weird. If they were destroyed, that fact would have been mentioned.

Doctor Who: "Tooth and Claw", "The Sound of Drums", "The End of Time Parts I and II"

The Time War occurred sometime between the Eighth Doctor (played by Paul McGann, the "last Classic" Doctor Who) and the Ninth Doctor (Chris Eccleston, the first of the "New" Doctor Who). It involves the Time Lords of Gallifrey and the Daleks and ended with the destruction of the Doctor's home. The details of the Time War aren't clear, but the Ninth, Tenth and Eleventh Doctors imply that he (the Eighth Doctor at the time) made the fateful decision to destroy Gallifrey to save the rest of the Universe. It's implied that the Doctor is now the last of his race.

The whole incident was put under a Time Lock so no one (the Doctor included) could time-travel back to it and change the outcome. In"The End of Time", the Time Lords escape and attempt to take over Earth. Of course the Doctor stops them, but to save one of his Companions, he absorbs over a million rads of radiation (which triggers his regeneration into the Eleventh Doctor).

James MacCrimmon was the name of one of the Second Doctor's Companions. He was a Scotsman from the 1746 Jacobite Rebellion that was saved by the Doctor. The Tenth Doctor used "Doctor Jamie MacCrimmon" as an alias when he and Rose Tyler met Queen Victoria in "Tooth and Claw". 
 

Trip and Malcolm discover there are far-reaching consequences of time travel. Especially when your ride is a month late. Some Trip and Malcolm angst in this chappie...don't worry, things will turn out all right in the end. But keep the tissues handy.

Spoilers: ENT "Terra Prime"