Lucie: Why did they have to die for this stupid "Protocol"?

Doctor: No, not stupid. Nothing which gives people hope, strength and courage is stupid. Protocol preserves us.

SERVO: (clear their throat)

Four two three six C B two,

Eight eight three F D zero two.

DOCTOR: Very moving.

SERVO: It's in hexadecimal machine code. It translates as: I look out to the stars and I feel my life is insignificant, but then I look again…

DOCTOR: But then I look again and I feel glad to be alive.