Meet the new Doctor Who classics. When the entire universe is at stake, three different Doctors will unite to save it.

The Tenth Doctor is hunting shape-shifting Zygons in Elizabethan England. The Eleventh is investigating a rift in space-time in the present day. And one other - the man they used to be but never speak of - is fighting the Daleks in the darkest days of the Time War.

Driven by demons and despair, this battle-scarred Doctor is set to take a devastating decision that will threaten the survival of the entire universea a decision that not even a Time Lord can take alone.

On this day, the Doctor's different incarnations will come together to save the Eartha to save the universea and to save his soul.