Continuity
The tuxedo the Doctor wears has made two previous appearances, first in "The Age of Steel"/"Rise of the Cybermen" and then again in "The Lazarus Experiment". The Doctor tells Martha Jones that bad things always seem to happen when he wears it.
Bannakaffalatta's species is not specifically named until The End of Time.
When the Doctor meets Midshipman Frame he is excited to learn his first name is Alonso. In "Army of Ghosts", the Doctor mentions that he always wanted to meet someone named Alonso so that he could exclaim "Allons-y Alonso!". He gets his wish at the end of this episode, yelling it before saving the ship. Midshipman Frame would also appear in The End of Time in the bar scene when the Doctor hooks him up with Jack Harkness.
In an alternate universe in the episode "Turn Left" the Titanic does crash into London, completely wiping it off the map.
Read more about this topic: Voyage Of The Damned (Doctor Who)
Famous quotes containing the word continuity:
“Every society consists of men in the process of developing from children into parents. To assure continuity of tradition, society must early prepare for parenthood in its children; and it must take care of the unavoidable remnants of infantility in its adults. This is a large order, especially since a society needs many beings who can follow, a few who can lead, and some who can do both, alternately or in different areas of life.”
—Erik H. Erikson (1904–1994)
“The dialectic between change and continuity is a painful but deeply instructive one, in personal life as in the life of a people. To “see the light” too often has meant rejecting the treasures found in darkness.”
—Adrienne Rich (b. 1929)
“Every generation rewrites the past. In easy times history is more or less of an ornamental art, but in times of danger we are driven to the written record by a pressing need to find answers to the riddles of today.... In times of change and danger when there is a quicksand of fear under men’s reasoning, a sense of continuity with generations gone before can stretch like a lifeline across the scary present and get us past that idiot delusion of the exceptional Now that blocks good thinking.”
—John Dos Passos (1896–1970)