It isn't clear how the episodes carved into three parts - TWiDW has assumed 3/3/4.

Intro: Tonight, a landmark adventure: the first to introduce the Time Lords, explain The Doctor's origin, the last Patrick Troughton story, and one of the very longest which we will present over three Sunday nights. Stay with us now for part one of "The War Games."

Outro: What are these aliens up to? What mysteries lie in the area indicated by the blank space on the map? "The War Games" will continue next Sunday night at 11:25. [source: ChicagoEpguides]