WHAT IS IT?

THROUGH SERIES 5 AND 6, A MYSTERIOUS PROPHECY HAUNTED THE DOCTOR.  IT STATED THAT ON THE FINAL DAY OF HIS FINAL LIFE, SILENCE WILL FALL AND THE QUESTION WILL BE ASKED . . .

CRACKS IN TIME
TEARS IN THE FABRIC OF REALITY FORM AS CRACKS.  SOME ARE SMALL AND SOME ARE HUGE, SOME REMOVE YOU FROM TIME AND OTHERS ARE PRISONS.  IT WASN'T UNTIL THE TIME OF THE DOCTOR  WHEN THE MYSTERY OF THE CRACKS WAS FULLY EXPLAINED.

THE ELEVENTH HOUR
A CRACK APPEARS IN AMELIA POND'S BEDROOM, WHICH PRISONER ZERO ESCAPES FROM.

THE ELEVENTH HOUR
A CRACK APPEARS ON THE TARDIS SCREEN.

THE BEAST BELOW
A HUGE CRACK APPEARS ON THE STARSHIP UK.

VICTORY OF THE DALEKS
A CRACK APPEARS ON A WALL IN WORLD WAR II AS THE TARDIS DEMATERIALISES.

FLESH AND STONE
THE DOCTOR AND AMY NOTICE ANOTHER CRACK.

COLD BLOOD
THE LIGHT FROM A CRACK REMOVES RORY FROM TIME.

THE LODGER
A CRACK APPEARS AS AMY FINDS HER ENGAGEMENT RING FROM RORY.

THE PANDORICA OPENS
A CRACK APPEARS ON THE TARDIS SCREEN AS AN UNKNOWN VOICE SAYS 'SILENCE WILL FALL'.

THE TIME OF THE DOCTOR
AFTER A LONG TIME, A CRACK APPEARS ON TRENZALORE, THE TIME LORDS ASKING THE OLDEST QUESTION THROUGH IT: 'DOCTOR WHO?'

THE TIME OF THE DOCTOR
THE TIME LORDS OPEN UP A CRACK ON TRENZALORE AND SEND THE DOCTOR A WHOLE NEW REGENERATION CYCLE THROUGH IT.

SILENCE WILL FALL
THROUGHOUT THE ELEVENTH DOCTOR'S ERA, A MYSTERIOUS PROPHECY HAUNTS THE DOCTOR HAUNTS TIME AND SPACE.  IT'S NOT UNTIL THE TIME OF THE DOCTOR  WHEN THE SECRET OF THE SILENCE IS REVEALED.  A MYSTERIOUS RELIGIOUS GROUP NAME THEMSELVES THE SILENCE AND TRY TO STOP THE QUESTION 'DOCTOR WHO?' BEING ANSWERED ON TRENZALORE AT THE END OF THE DOCTOR'S LIFE . . .

THE ELEVENTH HOUR
PRISONER ZERO SAYS THAT THE PANDORICA WILL OPEN AND SILENCE WILL FALL.

THE VAMPIRES OF VENICE
RORY HEARS NOTHING BUT SILENCE.

THE BIG BANG
AN UNKNOWN VOICE SAYS 'SILENCE WILL FALL'.

A CHRISTMAS CAROL
ABIGAIL'S SONG IS THEMED AROUND SILENCE.