Tick Tock Goes The Clock (Unreleased OST Night Terrors)

Tick tock goes the clock... 
And what then shall we be?
Tick tock until the day,
That thou shall marry me. 
Tick tock goes the clock,
And all the years they fly.
Tick tock and all too soon,
You and I must die. 
Tick tock goes the clock,
We laughed at fate and mourned her.
Tick tock goes the clock,
Even for the Doctor. 
Tick tock goes the clock,
He cradled and he rocked her.
Tick tock goes the clock,
Even for the Doctor. 
Tick tock goes the clock,
And now what shall we play?
Tick tock goes the clock,
Now that summer’s gone away. 
Tick tock goes the clock,
He cradled and he rocked her.
Tick tock goes the clock,
‘Til River kills the Doctor. 
Doctor, brave and good,
Turned away from violence,
When he understood,
The falling of the Silence