Omega is the thirteenth episode of Doctor Who Series VII and the second of its two-part finale. It concludes the Anomaly Arc.
The TARDIS crew are trapped in the Royal Albert Hall by an energy barrier. While the Valeyard has succeeded in finding an Anomaly leading to Gallifrey before it was destroyed.
His plan to wipe the Time Lords from existence so the Daleks take over the universe is near completion.
But how does a Pyramid from 4000 years ago link with all this? The answer lies beneath the sands of Egypt.