Zero stages an answer to Guilford's challenge that frees his companions.
If Rolo doesn't stop him.
But Rolo has no family. Lelouch tells him that even if the memories are fake, the last year they spent together was real. He turns his loyalty.
It's all a lie, of course.
Suzaku returns to school. Two other Knights of the Round, Gino and Anya also arrive, with their custom Knightmares.
When Villetta was amnesiac, she stayed with Ohgi, the second-in-command of the Black Knights. Lelouch learns this and blackmails her into working with him.